diff --git a/src/day13.scala b/src/day13.scala
index f3aef13..968051f 100644
--- a/src/day13.scala
+++ b/src/day13.scala
@@ -9,11 +9,6 @@ val dayNumber = "13"
 @main def part2: Unit =
   println(part2(loadInput(dayNumber)))
 
-def transpose(grid: List[String]): List[String] =
-  List.tabulate(grid.head.length)(x =>
-    Array.tabulate(grid.length)(y => grid(y)(x)).mkString
-  )
-
 def part1(input: String): String =
   def findReflection(rows: List[String]): Option[Int] =
     (1 until rows.length).find(i =>
@@ -27,7 +22,7 @@ def part1(input: String): String =
     .flatMap(pattern =>
       findReflection(pattern)
         .map(_ * 100)
-        .orElse(findReflection(transpose(pattern)))
+        .orElse(findReflection(pattern.transpose.map(_.mkString)))
     )
     .sum
     .toString
@@ -48,7 +43,7 @@ def part2(input: String): String =
     .flatMap(pattern =>
       findReflection(pattern)
         .map(_ * 100)
-        .orElse(findReflection(transpose(pattern)))
+        .orElse(findReflection(pattern.transpose.map(_.mkString)))
     )
     .sum
     .toString