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First Common Words solution in Clear category for Common Words by grigoriytretyakov
# migrated from python 2.7
def checkio(first, second):
first_words = set(first.split(','))
second_words = set(second.split(','))
common_words = first_words.intersection(second_words)
return ','.join(sorted(common_words))
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio("hello,world", "hello,earth") == "hello", "Hello"
assert checkio("one,two,three", "four,five,six") == "", "Too different"
assert checkio("one,two,three", "four,five,one,two,six,three") == "one,three,two", "1 2 3"
Jan. 16, 2015
