def checkio(words_set):
    for word1 in words_set:
        for word2 in words_set:
            if word1.endswith(word2) and word1 != word2:
                return True
            else:
                return False
 
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
    assert checkio({"hello", "lo", "he"}) == True, "helLO"
    assert checkio({"hello", "la", "hellow", "cow"}) == False, "hellow la cow"
    assert checkio({"walk", "duckwalk"}) == True, "duck to walk"
    assert checkio({"one"}) == False, "Only One"
    assert checkio({"helicopter", "li", "he"}) == False, "Only end"
# your code goes here

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