一、题目

二、解题

t = [int(x) for x in input().split(' ')]
k = []
for i in range(0, 4, 2):
    a = 0
    index = 0
    while t[i] != 0:
        if t[i] % 10 == t[i + 1]:
            a += t[i+1]*pow(10, index)
            index += 1
        t[i] //= 10
    k.append(a)
print(sum(k))