hash1 = "ca4974b7e8538aba9103bedef89f4426bc95f4c5a4f36d2ac2754290fa745b79"
hash2 = "aa54ec82fa33f048e2b728eaa2eaaadae3ee6c48a730766ab8e7ffb459ce870e"

bithash1 = bin(int(hash1, 16))[2:].zfill(256)
bithash2 = bin(int(hash2, 16))[2:].zfill(256)

diffbits = 0

for x, y in zip(bithash1, bithash2):
    if x != y:
        diffbits = diffbits + 1

print(diffbits)