diff --git a/src/day04.rs b/src/day04.rs
index 28348ca..e47a44e 100644
--- a/src/day04.rs
+++ b/src/day04.rs
@@ -11,13 +11,12 @@ struct Board(Vec<Vec<Option<u32>>>);
 
 impl Day for Day04 {
     fn init(content: String) -> Self where Self: Sized {
-        let mut l = content.lines().collect::<Vec<&str>>();
-        let first = l[0];
-        let a = l.drain(0..2);
-        drop(a);
+        let l = content.lines().collect::<Vec<&str>>();
+        let (a, b) = l.split_at(2);
+        let first = a[0];
         let nums = first.split(',').map(|x| x.parse::<u32>().expect("wat?")).collect();
 
-        let split = l.split(|x| x.is_empty());
+        let split = b.split(|x| x.is_empty());
 
         let boards = split.map(|vecs|
             vecs.iter().map(