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First solution in Clear category for Common Words by s.bidowaniec
def checkio(first, second):
first, second = set(first.split(',')), set(second.split(',')) # convert to sets of element
return ','.join(sorted(first & second)) # return common set converted to string
#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"
May 27, 2018
