def distance(dna_strand1, dna_strand2):
    hamming_distance = 0
    for nucleotide1, nucleotide2 in zip(dna_strand1, dna_strand2):
        if nucleotide1 != nucleotide2:
            hamming_distance += 1
    return hamming_distance

81ce686af05044af2b11a853fa64df86552ea628
<mask token>

def distance(dna_strand1, dna_strand2):
    hamming_distance = 0
    for nucleotide1, nucleotide2 in zip(dna_strand1, dna_strand2):
        if nucleotide1 != nucleotide2:
            hamming_distance += 1
    return hamming_distance
