def is_different(letter1, letter2):
    return letter1 != letter2


def distance(seq1, seq2):
    distance = 0
    for index, _ in enumerate(seq1):
        if is_different(seq1[index], seq2[index]):
            distance += 1
    return distance

5252d577d1b37529978c49c3bdb4da8bfff7a319
<mask token>

def is_different(letter1, letter2):
    return letter1 != letter2


<mask token>

def is_different(letter1, letter2):
    return letter1 != letter2


def distance(seq1, seq2):
    distance = 0
    for index, _ in enumerate(seq1):
        if is_different(seq1[index], seq2[index]):
            distance += 1
    return distance
