'''
If you were designing a web crawler, how would you avoid getting into infinite loops?

Hints: 334, 353, 365
'''


def webcrawler(s):
    pass

if __name__ == '__main__':
    assert webcrawler('') ==
    assert webcrawler('') ==
    assert webcrawler('') ==
    assert webcrawler('') ==
    assert webcrawler('') ==
