Created
May 31, 2016 21:36
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| # Solution for https://www.hackerrank.com/challenges/game-of-throne-ii | |
| from collections import Counter | |
| from math import factorial as f | |
| word = raw_input() | |
| letter_count = [i/2 for i in Counter(word).values()] | |
| print (f(sum(letter_count)) / (reduce(lambda acc, x: acc * f(x), letter_count, 1))) % (10**9 + 7) |
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