def checkio(words_set):

for w1 in words_set:

for w2 in words_set:

if w1 == w2:

continue

elif w1.endswith(w2)==1:

return True

return False

#return True or 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"