def solve():
    li = []
    line = input().split(' ')
    for i in range(3):
        if (line[i] == '?'):
            n = 0
        else:
            n = int(line[i])
        li.append(n)
    if (isKadomatsu(li, 1) and isKadomatsu(li, 4)):
        print(14)
    elif (isKadomatsu(li, 1)):
        print(1)
    elif (isKadomatsu(li, 4)):
        print(4)


def isKadomatsu(li, n):
    a = li[0] if li[0] != 0 else n
    b = li[1] if li[1] != 0 else n
    c = li[2] if li[2] != 0 else n

    if (a < b and c < b and a != b != c):
        return True
    if (a > b and c > b and a != b != c):
        return True
    return False


solve()