code

def bn(n):
    return bin(n)[2::]

com = bn(192) + bn(168) + bn(200)
a =  com + bn(140)
b = com + bn(145)
c = com + bn(148)
print(a)
print(b)
print(c)
for i in range(26, len(b)):
    if a[::i] != c[::i] and b[::i] == c[::i]:
        print(i+1)
        break
#ответ: 28