c = input().split()

q = c.index('?')
if q == 0:
    a = int(c[1])
    b = int(c[2])
    if a < b:
        print('4')
    else:
        print('1')
elif q == 1:
    a = int(c[0])
    b = int(c[2])
    print('14')
else:
    a = int(c[0])
    b = int(c[1])
    if a < b:
        print('1')
    else:
        print('4')