carray = input().split()
carray_four = list(map(int,["4" if i=="?"  else i for i in carray ]))
carray_one = list(map(int,["1" if i=="?"  else i for i in carray ]))
condition_four = len(set(carray_four))==3 and ((max(carray_four)==carray_four[1]) or (min(carray_four)==carray_four[1]))
condition_one = len(set(carray_one))==3 and ((max(carray_one)==carray_one[1]) or (min(carray_one)==carray_one[1]))
if condition_four and condition_one:
    print("14")
elif condition_four and not(condition_one):
    print("4")
else:
    print("1")