diff --git a/day5a/src/main.rs b/day5a/src/main.rs
index fdc308b..292e713 100644
--- a/day5a/src/main.rs
+++ b/day5a/src/main.rs
@@ -4,16 +4,13 @@ use std::io::Read;
 fn main() {
     let mut input = String::new();
     io::stdin().read_to_string(&mut input).unwrap();
-    println!("{}", input
-        .lines()
-        .map(|x| x.chars().rev().map(|y| match y {
-            'F' => 0,
-            'B' => 1,
-            'L' => 0,
-            'R' => 1,
-            _ => 0,
-        }).enumerate().fold(0, |acc, x| acc + (x.1 << x.0)))
-        .max()
-        .unwrap()
+    println!("{}",
+        input
+            .lines()
+            .map(|l| l.bytes().fold(0, |a, b| a << 1
+                | if b == b'B' || b == b'R' { 1 } else { 0 }))
+            .max()
+            .unwrap()
+
     );
 }