diff --git a/2022/src/common.rs b/2022/src/common.rs
index 15b0154..085cf22 100644
--- a/2022/src/common.rs
+++ b/2022/src/common.rs
@@ -1,6 +1,10 @@
 //! Common helper utilities to all days
 
 use std::cmp::Ordering;
+use std::ops::Add;
+use std::ops::Index;
+use std::ops::IndexMut;
+use std::ops::Sub;
 
 use anyhow::Result;
 use nom::combinator::map;
@@ -172,3 +176,38 @@ impl IndexSet {
         }
     }
 }
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+pub struct Vec2(pub [i32; 2]);
+
+impl Add<Self> for Vec2 {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        Self([self[0] + rhs[0], self[1] + rhs[1]])
+    }
+}
+
+impl Sub<Self> for Vec2 {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        Self([self[0] - rhs[0], self[1] - rhs[1]])
+    }
+}
+
+impl Index<usize> for Vec2 {
+    type Output = i32;
+
+    #[inline]
+    fn index(&self, index: usize) -> &Self::Output {
+        &self.0[index]
+    }
+}
+
+impl IndexMut<usize> for Vec2 {
+    #[inline]
+    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
+        &mut self.0[index]
+    }
+}
diff --git a/2022/src/day09.rs b/2022/src/day09.rs
index 51460ac..267752a 100644
--- a/2022/src/day09.rs
+++ b/2022/src/day09.rs
@@ -1,8 +1,3 @@
-use std::ops::Add;
-use std::ops::Index;
-use std::ops::IndexMut;
-use std::ops::Sub;
-
 use ahash::AHashSet;
 use anyhow::Result;
 use nom::bytes::complete::tag;
@@ -15,6 +10,7 @@ use nom::sequence::terminated;
 use nom::IResult;
 
 use crate::common::parse_input;
+use crate::common::Vec2;
 
 #[derive(Copy, Clone)]
 enum Direction {
@@ -60,41 +56,6 @@ fn parse_moves(input: &[u8]) -> IResult<&[u8], Vec<(Direction, u32)>> {
     ))(input)
 }
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
-struct Vec2(pub [i32; 2]);
-
-impl Add<Self> for Vec2 {
-    type Output = Self;
-
-    fn add(self, rhs: Self) -> Self::Output {
-        Self([self[0] + rhs[0], self[1] + rhs[1]])
-    }
-}
-
-impl Sub<Self> for Vec2 {
-    type Output = Self;
-
-    fn sub(self, rhs: Self) -> Self::Output {
-        Self([self[0] - rhs[0], self[1] - rhs[1]])
-    }
-}
-
-impl Index<usize> for Vec2 {
-    type Output = i32;
-
-    #[inline]
-    fn index(&self, index: usize) -> &Self::Output {
-        &self.0[index]
-    }
-}
-
-impl IndexMut<usize> for Vec2 {
-    #[inline]
-    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
-        &mut self.0[index]
-    }
-}
-
 fn part_generic<const N: usize>(input: &[u8]) -> Result<String> {
     let moves = parse_input(input, parse_moves)?;
 
diff --git a/2022/src/day14.rs b/2022/src/day14.rs
index 1278dea..2ae8b3d 100644
--- a/2022/src/day14.rs
+++ b/2022/src/day14.rs
@@ -91,7 +91,7 @@ fn parse_cave(input: &[u8]) -> IResult<&[u8], Cave> {
 
     let mut input = input;
 
-    while input != &[][..] {
+    while input != &b""[..] {
         let new_input = terminated(
             reduce_many1(
                 terminated(parse_pair, opt(tag(" -> "))),