diff --git a/src/chardonnay.py b/src/chardonnay.py
new file mode 100644
index 0000000..644eec3
--- /dev/null
+++ b/src/chardonnay.py
@@ -0,0 +1,2 @@
+a = int(input())
+print(a if a in [0, 7] else a + 1)