diff --git a/src/main/kotlin/no/rodland/advent/Cave.kt b/src/main/kotlin/no/rodland/advent/Cave.kt
index 35c0883f..e28d58cc 100644
--- a/src/main/kotlin/no/rodland/advent/Cave.kt
+++ b/src/main/kotlin/no/rodland/advent/Cave.kt
@@ -29,6 +29,8 @@ fun fromMap(map: Map<Pos, Char>): Cave {
     }
 }
 
+fun List<String>.toCave(): Cave = map { line -> line.toCharArray() }.toTypedArray()
+
 @Suppress("UNUSED_PARAMETER")
 fun Cave.print(minX: Int = 0, minY: Int = 0, maxX: Int = first().size, maxY: Int = size) {
     forEach { ca ->
diff --git a/src/main/kotlin/no/rodland/advent_2024/Day16.kt b/src/main/kotlin/no/rodland/advent_2024/Day16.kt
index c9f41d72..720b2f58 100644
--- a/src/main/kotlin/no/rodland/advent_2024/Day16.kt
+++ b/src/main/kotlin/no/rodland/advent_2024/Day16.kt
@@ -1,13 +1,15 @@
 package no.rodland.advent_2024
 
+import no.rodland.advent.Cave
 import no.rodland.advent.Day
+import no.rodland.advent.toCave
 
 // template generated: 15/12/2024
 // Fredrik Rødland 2024
 
-class Day16(val input: List<String>) : Day<Long, Long, List<String>> {
+class Day16(val input: List<String>) : Day<Long, Long, Array<CharArray>> {
 
-    private val parsed = input.parse()
+    private val maze = input.parse()
 
     override fun partOne(): Long {
         return 2
@@ -17,10 +19,8 @@ class Day16(val input: List<String>) : Day<Long, Long, List<String>> {
         return 2
     }
 
-    override fun List<String>.parse(): List<String> {
-        return map { line ->
-            line
-        }
+    override fun List<String>.parse(): Cave {
+        return this.toCave()
     }
 
     override val day = "16".toInt()
diff --git a/src/test/resources/2024/input_16_test.txt b/src/test/resources/2024/input_16_test.txt
index e69de29b..6a5bb850 100644
--- a/src/test/resources/2024/input_16_test.txt
+++ b/src/test/resources/2024/input_16_test.txt
@@ -0,0 +1,15 @@
+###############
+#.......#....E#
+#.#.###.#.###.#
+#.....#.#...#.#
+#.###.#####.#.#
+#.#.#.......#.#
+#.#.#####.###.#
+#...........#.#
+###.#.#####.#.#
+#...#.....#.#.#
+#.#.#.###.#.#.#
+#.....#...#.#.#
+#.###.#.#.#.#.#
+#S..#.....#...#
+###############
\ No newline at end of file