diff --git a/2021/d11/ex1/input b/2021/d11/ex1/input
new file mode 100644
index 0000000..ea9c78d
--- /dev/null
+++ b/2021/d11/ex1/input
@@ -0,0 +1,10 @@
+4341347643
+5477728451
+2322733878
+5453762556
+2718123421
+4237886115
+5631617114
+2217667227
+4236581255
+4482627641