a, b, c = input().split()

if a !="?" and c != "?":
    print("14")
    
elif b != "?" and c != "?":
    if int(b) < int(c):
        print("4")
    else:
        print("1")
elif a != "?" and b != "?":
    if int(a) > int(b):
        print("4")
    else:
        print("1")