def getTuples(cards, notIn, ofLength):
if ofLength==1:
if cards not in notIn:
return 1
return 0
else:
cnt=0
for tup in tupleRange(cards):
if tup not in notIn:
notIn = notIn.union([tup])
cnt += getTuples(tupleDiff(cards,tup), notIn, ofLength-1)
return cnt
