diff --git a/72411_py_jy.py b/72411_py_jy.py
new file mode 100644
index 0000000..80f1e3c
--- /dev/null
+++ b/72411_py_jy.py
@@ -0,0 +1,16 @@
+from itertools import combinations
+from collections import Counter
+
+def solution(orders, course):
+    answer = []
+    for cs in course:
+        tmp = []
+        for od in orders:
+            cb = combinations(sorted(od), cs)
+            tmp += cb
+        ct = Counter(tmp)
+        if len(ct) != 0 and max(ct.values()) != 1:
+            answer += [''.join(ff) for ff in ct if 
+                       ct[ff] == max(ct.values())]
+    answer = sorted(answer)
+    return answer
\ No newline at end of file