import math
A = []
A.append(input())
A.append(input())
A.append(input())
A.append(input())
A.append(input())
A.append(input())
ans = 1
for i in range(6):
    gcd = 10
    for j in range(6):
        a = int(A[j][i])
        gcd = math.gcd(gcd, a)
    ans *= 10 // gcd
print(ans)