diff --git a/Cargo.lock b/Cargo.lock
index 2105c9b..c9f28d7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -40,6 +40,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "clap"
 version = "3.0.10"
@@ -70,6 +76,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "418d37c8b1d42553c93648be529cb70f920d3baf8ef469b74b9638df426e0b4c"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.11.2"
@@ -107,6 +124,7 @@ version = "0.1.0"
 dependencies = [
  "alphanumeric-sort",
  "clap",
+ "rand",
  "regex",
  "shellwords",
 ]
@@ -138,6 +156,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -180,6 +204,36 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "regex"
 version = "1.5.4"
@@ -251,6 +305,12 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index ae02e87..3477dde 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,7 @@ regex = "1"
 clap = {version = "3", features = ["derive", "env"]}
 alphanumeric-sort = "1"
 shellwords = "1"
+rand = "0.8"
 
 [profile.release]
 lto = true
diff --git a/src/errors.rs b/src/errors.rs
index 8380318..1cc8c07 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -1,3 +1,5 @@
+use std::num::ParseIntError;
+
 #[derive(Debug)]
 pub struct KakMessage(pub String, pub Option<String>);
 
@@ -21,3 +23,9 @@ impl From<shellwords::MismatchedQuotes> for KakMessage {
         Self("Corrupt kak response".to_string(), Some(err.to_string()))
     }
 }
+
+impl From<ParseIntError> for KakMessage {
+    fn from(err: ParseIntError) -> Self {
+        Self(format!("Could not parse int: {}", err), None)
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 1712086..763ae4a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,16 +1,20 @@
 #![warn(clippy::all, clippy::pedantic, clippy::nursery, clippy::cargo)]
+#![allow(dead_code, unused_imports)]
 
 mod errors;
-use alphanumeric_sort::compare_str;
+mod shuf;
+mod sort;
 use clap::Parser;
 use clap::Subcommand;
 use errors::KakMessage;
-use regex::Regex;
+use shuf::ShufOptions;
+use sort::SortOptions;
 use std::env;
 use std::fs;
 use std::fs::File;
 use std::fs::OpenOptions;
 use std::io::Write;
+use std::str::FromStr;
 
 #[derive(Parser, Debug)]
 #[clap(about, version, author)]
@@ -26,32 +30,84 @@ struct Cli {
 
 #[derive(Subcommand, Debug)]
 enum Commands {
-    // #[clap(flatten)]
     Sort(SortOptions),
+    Shuf(ShufOptions),
 }
 
-#[derive(clap::StructOpt, Debug)]
-struct SortOptions {
-    #[clap(index = 1)]
-    regex: Option<String>,
-    #[clap(short = 's', long)]
-    subselections_register: Option<char>,
-    // TODO: Can we invert a boolean? This name is terrible
-    #[clap(short = 'S', long)]
-    no_skip_whitespace: bool,
-    #[clap(short, long)]
-    lexicographic_sort: bool,
-    #[clap(short, long)]
-    reverse: bool,
-    #[clap(short, long)]
-    ignore_case: bool,
+#[derive(PartialEq, PartialOrd, Debug)]
+pub struct SelectionDesc {
+    left: AnchorPosition,
+    right: AnchorPosition,
 }
 
-struct SortableSelection {
-    content: &str,
-    subselections: Vec<&str>,
+impl FromStr for SelectionDesc {
+    type Err = KakMessage;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let (left, right) = s.split_once(',').ok_or_else(|| {
+            KakMessage(
+                "Could not parse position".to_string(),
+                Some(format!("Could not parse as position: {}", s)),
+            )
+        })?;
+
+        Ok(Self {
+            left: AnchorPosition::from_str(left)?,
+            right: AnchorPosition::from_str(right)?,
+        })
+    }
 }
 
+#[derive(PartialOrd, PartialEq, Clone, Debug)]
+pub struct AnchorPosition {
+    row: usize,
+    col: usize,
+}
+impl FromStr for AnchorPosition {
+    type Err = KakMessage;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let (left, right) = s.split_once('.').ok_or_else(|| {
+            KakMessage(
+                "Could not parse position".to_string(),
+                Some(format!("Could not parse as position: {}", s)),
+            )
+        })?;
+        Ok(Self {
+            row: usize::from_str(left)?,
+            col: usize::from_str(right)?,
+        })
+    }
+}
+
+impl SelectionDesc {
+    fn sort(&self) -> Self {
+        if self.left < self.right {
+            // left anchor is first
+            Self {
+                left: self.left.clone(),
+                right: self.right.clone(),
+            }
+        } else {
+            // right anchor is first
+            Self {
+                left: self.right.clone(),
+                right: self.left.clone(),
+            }
+        }
+    }
+
+    fn contains(&self, b: &Self) -> bool {
+        // Cursor and anchor can be flipped. Set a.0 to be leftmost cursor
+        let sorted_a = self.sort();
+        let sorted_b = b.sort();
+
+        sorted_b.left >= sorted_a.left && sorted_b.right <= sorted_b.right
+    }
+}
+
+// impl PartialOrd for SelectionDesc {
+//     fn cmp() {}
+// }
+
 fn main() {
     let msg = match run() {
         Ok(msg) => msg,
@@ -91,128 +147,18 @@ fn run() -> Result<KakMessage, KakMessage> {
     })?;
 
     match &options.command {
-        Commands::Sort(sort_options) => sort(sort_options),
+        Commands::Sort(sort_options) => sort::sort(sort_options),
+        Commands::Shuf(shuf_options) => shuf::shuf(shuf_options),
     }
 }
 
-fn sort_keys_simple<'a>(
-    sort_options: &SortOptions,
-    selections: &[&str],
-) -> Result<Vec<SortableSelection>, KakMessage> {
-    let re = sort_options
-        .regex
-        .as_ref()
-        .map(|r| Regex::new(r))
-        .transpose()
-        .map_err(|_| {
-            format!(
-                "Invalid regular expression: {}",
-                sort_options.regex.as_ref().unwrap_or(&"".to_string())
-            )
-        })?;
-
-    Ok(selections
-        .iter()
-        .map(|s| {
-            if sort_options.no_skip_whitespace {
-            SortableSelection{
-                content: s,
-                subselections: vec![s],
-                }
-            } else {
-            SortableSelection{
-                content: s,
-                subselections: vec![s.trim()],
-                }
-            }
-        })
-        .map(|(s, k)| {
-            let captures = re.as_ref()?.captures(k)?;
-            captures
-                .get(1)
-                .or_else(|| captures.get(0))
-                .map(|m| m.as_str())
-        })
-        .collect::<Vec<Option<&str>>>())
-}
-
-// fn sort_keys_subselection(sort_options: &SortOptions) -> Result<Vec<(&String, Option<&str>)>, KakMessage> {
-//     let sort_selections = kak_response("%val{selections}")?.iter_mut().map(|a| {
-//             if sort_options.no_skip_whitespace {
-//                 a
-//             } else {
-//                 a.trim()
-//             }
-//         });
-//     let sort_selections_desc = kak_response("%val{selections_desc}")?;
-//     kak_exec("z")?;
-//     let selections = kak_response("%val{selections}")?;
-//     let selections_desc = kak_response("%val{selections_desc}")?;
-// }
-
-fn sort(sort_options: &SortOptions) -> Result<KakMessage, KakMessage> {
-    // let selections = kak_response("%val{selections}")?;
-
-    // let sort_keys = if let Some(r) = sort_options.subselections_register {
-    //     let selections_desc = kak_response("%val{selections_desc}")?;
-    // } else {
-    // };
-
-    let mut zipped = match sort_options.subselections_register {
-        Some(c) => {
-            let selections = kak_response("%val{selections}")?;
-            selections
-                .into_iter()
-                .zip(sort_keys_simple(sort_options, &selections))
-        }
-        None => {
-            let selections = kak_response("%val{selections}")?;
-            selections.iter().zip(selections.iter().map(|s| s.as_str()))
-        }
-    };
-
-    // let mut zipped = sort_keys_simple(sort_options)?;
-
-    zipped.sort_by(|(a, a_key), (b, b_key)| {
-        let a = a_key.unwrap_or(a);
-        let b = b_key.unwrap_or(b);
-
-        if sort_options.lexicographic_sort {
-            a.cmp(b)
-        } else {
-            compare_str(a, b)
-        }
-    });
-
-    let mut f = open_command_fifo()?;
-
-    write!(f, "reg '\"'")?;
-
-    let iter: Box<dyn Iterator<Item = _>> = if sort_options.reverse {
-        Box::new(zipped.iter().rev())
-    } else {
-        Box::new(zipped.iter())
-    };
-
-    for i in iter {
-        let new_selection = i.0.replace('\'', "''");
-        write!(f, " '{}'", new_selection)?;
-    }
-    write!(f, " ; exec R;")?;
-
-    Ok(KakMessage(
-        format!("Sorted {} selections", zipped.len()),
-        None,
-    ))
-}
-
-fn kak_exec(cmd: &str) -> Result<(), KakMessage> {
+pub fn kak_exec(cmd: &str) -> Result<(), KakMessage> {
     let mut f = open_command_fifo()?;
 
     write!(f, "{}", cmd).map_err(|e| e.into())
 }
 
-fn kak_response(msg: &str) -> Result<Vec<String>, KakMessage> {
+pub fn kak_response(msg: &str) -> Result<Vec<String>, KakMessage> {
     kak_exec(&format!(
         "echo -quoting shell -to-file {} -- {msg}",
         get_var("kak_response_fifo")?
@@ -223,7 +169,7 @@ fn kak_response(msg: &str) -> Result<Vec<String>, KakMessage> {
     Ok(selections)
 }
 
-fn open_command_fifo() -> Result<File, KakMessage> {
+pub fn open_command_fifo() -> Result<File, KakMessage> {
     OpenOptions::new()
         .write(true)
         .append(true)
@@ -231,7 +177,7 @@ fn open_command_fifo() -> Result<File, KakMessage> {
         .map_err(|e| e.into())
 }
 
-fn get_var(var_name: &str) -> Result<String, KakMessage> {
+pub fn get_var(var_name: &str) -> Result<String, KakMessage> {
     env::var(var_name).map_err(|e| match e {
         env::VarError::NotPresent => {
             KakMessage(format!("Env var {} is not defined", var_name), None)
@@ -241,3 +187,25 @@ fn get_var(var_name: &str) -> Result<String, KakMessage> {
         }
     })
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    #[test]
+    fn test_anchor_position() {
+        let sd = SelectionDesc {
+            left: AnchorPosition { row: 18, col: 9 },
+            right: AnchorPosition { row: 10, col: 0 },
+        };
+        // Check parsing
+        assert_eq!(SelectionDesc::from_str("18.9,10.0").unwrap(), sd);
+        // Check if multiple parsed ones match
+        assert_eq!(
+            SelectionDesc::from_str("18.9,10.0").unwrap(),
+            SelectionDesc::from_str("18.9,10.0").unwrap()
+        );
+        // Check if sorting works
+        assert_eq!(sd.sort(), SelectionDesc::from_str("10.0,18.9").unwrap());
+        assert_eq!(sd.sort(), sd.sort().sort());
+    }
+}
diff --git a/src/shuf.rs b/src/shuf.rs
new file mode 100644
index 0000000..483ee1c
--- /dev/null
+++ b/src/shuf.rs
@@ -0,0 +1,27 @@
+use crate::KakMessage;
+use crate::{kak_response, open_command_fifo};
+use rand::seq::SliceRandom;
+use rand::thread_rng;
+use std::io::Write;
+#[derive(clap::StructOpt, Debug)]
+pub struct ShufOptions;
+pub fn shuf(_shuf_options: &ShufOptions) -> Result<KakMessage, KakMessage> {
+    let mut selections = kak_response("%val{selections}")?;
+    let mut rng = thread_rng();
+
+    selections.shuffle(&mut rng);
+
+    let mut f = open_command_fifo()?;
+    write!(f, "reg '\"'")?;
+
+    for i in selections.iter() {
+        let new_selection = i.replace('\'', "''");
+        write!(f, " '{}'", new_selection)?;
+    }
+    write!(f, " ; exec R;")?;
+
+    Ok(KakMessage(
+        format!("Shuf {} selections", selections.len()),
+        None,
+    ))
+}
diff --git a/src/sort.rs b/src/sort.rs
new file mode 100644
index 0000000..bd17273
--- /dev/null
+++ b/src/sort.rs
@@ -0,0 +1,147 @@
+use crate::KakMessage;
+use crate::{kak_response, open_command_fifo};
+use alphanumeric_sort::compare_str;
+use rand::seq::SliceRandom;
+use rand::thread_rng;
+use regex::Regex;
+use std::cmp::Ordering;
+use std::io::Write;
+
+#[derive(clap::StructOpt, Debug)]
+pub struct SortOptions {
+    #[clap(index = 1)]
+    regex: Option<Regex>,
+    #[clap(short = 's', long)]
+    subselections_register: Option<char>,
+    // TODO: Can we invert a boolean? This name is terrible
+    #[clap(short = 'S', long)]
+    no_skip_whitespace: bool,
+    #[clap(short, long)]
+    lexicographic_sort: bool,
+    #[clap(short, long)]
+    reverse: bool,
+    #[clap(short, long)]
+    ignore_case: bool,
+}
+
+struct SortableSelection<'a> {
+    /// The content of the selection
+    content: &'a str,
+    /// The string used to compare the content
+    content_comparison: &'a str,
+    /// Any subselections
+    subselections: Vec<&'a str>,
+}
+
+fn get_sortable_selections_subselections<'a, 'b, 'tmp, S: AsRef<str> + std::fmt::Debug + 'a>(
+    sort_options: &'b SortOptions,
+    selections: &'a [S],
+    sort_selections_desc: &'tmp [S],
+    subselections: &'a [S],
+    subselections_desc: &'tmp [S],
+) -> Result<Vec<SortableSelection<'a>>, KakMessage> {
+    eprintln!(
+        "All units: {:?}\n{:?}\n{:?}\n{:?}",
+        selections, sort_selections_desc, subselections, subselections_desc,
+    );
+    let mut sortable_selections = selections
+        .iter()
+        .map(|s| to_sortable_selection(s.as_ref(), sort_options))
+        .collect::<Vec<SortableSelection>>();
+
+    // sortable_selections.into_iter().map
+
+    // Ok(vec![])
+    todo!();
+}
+
+fn to_sortable_selection<'a, 'b>(
+    selection: &'a str,
+    sort_options: &'b SortOptions,
+) -> SortableSelection<'a> {
+    if sort_options.no_skip_whitespace {
+        SortableSelection {
+            content: selection,
+            content_comparison: selection,
+            subselections: vec![],
+        }
+    } else {
+        SortableSelection {
+            content: selection,
+            content_comparison: selection.trim(),
+            subselections: vec![],
+        }
+    }
+}
+
+pub fn sort(sort_options: &SortOptions) -> Result<KakMessage, KakMessage> {
+    let subselections: Option<(Vec<String>, Vec<String>)> = sort_options
+        .subselections_register
+        .map::<Result<(Vec<String>, Vec<String>), KakMessage>, _>(|_c| {
+            let subselections = kak_response("%val{selections}")?;
+            let subselections_desc = kak_response("%val{selections_desc}")?;
+            // kak_exec(&format!("exec z",))?;
+            Ok((subselections, subselections_desc))
+        })
+        .transpose()?;
+    let selections = kak_response("%val{selections}")?;
+
+    let mut zipped: Vec<SortableSelection<'_>> = match subselections {
+        Some((ref subselections, ref subselections_desc)) => {
+            let selections_desc = kak_response("%val{selections_desc}")?;
+
+            get_sortable_selections_subselections(
+                sort_options,
+                &selections,
+                &selections_desc,
+                subselections,
+                subselections_desc,
+            )?
+        }
+        None => selections
+            .iter()
+            .map(|s| to_sortable_selection(s, sort_options))
+            .collect(),
+    };
+
+    zipped.sort_by(|a, b| {
+        for (a_subselection, b_subselection) in a.subselections.iter().zip(b.subselections.iter()) {
+            let comparison = if sort_options.lexicographic_sort {
+                a_subselection.cmp(b_subselection)
+            } else {
+                compare_str(a_subselection, b_subselection)
+            };
+            match comparison {
+                Ordering::Less | Ordering::Greater => return comparison,
+                Ordering::Equal => {}
+            }
+        }
+
+        if sort_options.lexicographic_sort {
+            a.content_comparison.cmp(b.content_comparison)
+        } else {
+            compare_str(a.content_comparison, b.content_comparison)
+        }
+    });
+
+    let mut f = open_command_fifo()?;
+
+    write!(f, "reg '\"'")?;
+
+    let iter: Box<dyn Iterator<Item = _>> = if sort_options.reverse {
+        Box::new(zipped.iter().rev())
+    } else {
+        Box::new(zipped.iter())
+    };
+
+    for i in iter {
+        let new_selection = i.content.replace('\'', "''");
+        write!(f, " '{}'", new_selection)?;
+    }
+    write!(f, " ; exec R;")?;
+
+    Ok(KakMessage(
+        format!("Sorted {} selections", zipped.len()),
+        None,
+    ))
+}