diff --git a/2021/four.nim b/2021/four.nim
new file mode 100644
index 0000000..f617b8a
--- /dev/null
+++ b/2021/four.nim
@@ -0,0 +1,37 @@
+import std/[strutils, sequtils, options, math, parseutils]
+import ./common
+
+proc squidBingo(inputLines: seq[string]): int =
+  var input: seq[string] = inputLines
+  let calledNumbers: seq[string] = input[0].split(',')
+  input.delete(0..1)
+  echo calledNumbers
+  return 0
+
+let input = 4.loadInput()
+time("squidBingo part 1"): echo input.squidBingo()
+
+when not defined(release):
+  static:
+    let testInput = """
+    7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
+
+    22 13 17 11  0
+     8  2 23  4 24
+    21  9 14 16  7
+     6 10  3 18  5
+     1 12 20 15 19
+
+     3 15  0  2 22
+     9 18 13 17  5
+    19  8  7 25 23
+    20 11 10 24  4
+    14 21 16 12  6
+
+    14 21 17 24  4
+    10 16 15  9 19
+    18  8 23 26 20
+    22 11 13  6  5
+     2  0 12  3  7
+    """.strip().split('\n')
+    doAssert testInput.squidBingo() == 4512