#N = int(input())
c = input().split()
#s = [[int(j) for j in input().split()] for i in range(N)]

for i in range(3):
    if c[i] != "?":
        continue
    if i==1:
        print(14)
    else:
        if c[1]=='3':
            print(1)
        else:
            print(4)
    break