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First solution in Clear category for Common Words by jantechner
def checkio(first, second):
one = first.split(",")
two = second.split(",")
result = []
for i in one:
if i in two :
result.append(i)
result = sorted(result)
e = ""
for i in result:
e=e+i+","
return e[:len(e)-1]
#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"
Nov. 18, 2016
