diff --git a/2020/data/day25.expected b/2020/data/day25.expected
new file mode 100644
index 0000000..64b432a
--- /dev/null
+++ b/2020/data/day25.expected
@@ -0,0 +1,2 @@
+18433997
+???
diff --git a/2020/data/day25.input b/2020/data/day25.input
new file mode 100644
index 0000000..cc87f2a
--- /dev/null
+++ b/2020/data/day25.input
@@ -0,0 +1,2 @@
+18499292
+8790390