def hamming2(s1, s2):
"""Calculate the Hamming distance between two bit strings"""
assert len(s1) == len(s2)
return sum(c1 != c2 for c1, c2 in zip(s1, s2))
s1 = 'CTACAGCAATACGATCATATGCGGATCCGCAGTGGCCGGTAGACACACGT'
s2 = 'CTACCCCGCTGCTCAATGACCGGGACTAAAGAGGCGAAGATTATGGTGTG'
hamming2(s1, s2)
ZGVmIGhhbW1pbmcyKHMxLCBzMik6CiAgICAiIiJDYWxjdWxhdGUgdGhlIEhhbW1pbmcgZGlzdGFuY2UgYmV0d2VlbiB0d28gYml0IHN0cmluZ3MiIiIKICAgIGFzc2VydCBsZW4oczEpID09IGxlbihzMikKICAgIHJldHVybiBzdW0oYzEgIT0gYzIgZm9yIGMxLCBjMiBpbiB6aXAoczEsIHMyKSkKCnMxID0gJ0NUQUNBR0NBQVRBQ0dBVENBVEFUR0NHR0FUQ0NHQ0FHVEdHQ0NHR1RBR0FDQUNBQ0dUJwpzMiA9ICdDVEFDQ0NDR0NUR0NUQ0FBVEdBQ0NHR0dBQ1RBQUFHQUdHQ0dBQUdBVFRBVEdHVEdURycKCmhhbW1pbmcyKHMxLCBzMik=