From 9cfc2da26524287f6166cc20ca88ad568f762143 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=2E=20Fernando=20S=C3=A1nchez?= <balkian@gmail.com>
Date: Tue, 25 Feb 2014 08:00:51 -0800
Subject: [PATCH]

---
 frozen_combination.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 frozen_combination.py

diff --git a/frozen_combination.py b/frozen_combination.py
new file mode 100644
index 0000000..d8e193f
--- /dev/null
+++ b/frozen_combination.py
@@ -0,0 +1,13 @@
+def frozen_combination(*args):
+    combinations = set([frozenset(),])
+    for arg in args:
+        tempcomb = set(frozenset(),)
+        for i in set(arg):
+            tempcomb.update(set([frozenset(list(c)+[i]) for c in combinations if i not in c]))
+        if len(tempcomb) > 0:
+            combinations = tempcomb
+    return combinations
+#    return [set(comb) for comb in combinations] # for sets instead of frozensets
+res = frozen_combination(a,b)
+print res
+print len(res)
\ No newline at end of file