diff --git a/ex7-flip-the-coin b/ex7-flip-the-coin
index f48227c..2c92869 100644
--- a/ex7-flip-the-coin
+++ b/ex7-flip-the-coin
@@ -16,7 +16,7 @@ def count11(seq):
 
 def count11(seq):
     pattern = tuple([1,1]); k = len(pattern)
-    i = itertools.tee(sequence, k)
+    i = itertools.tee(seq, k)
     for j in range(k):
         for _ in range(j):
             next(i[j])