# coding: utf-8
# Your code here!
c = input().rstrip().split()
if c[1] == '?':
    print('14')
elif c[1] == '2':
    print('4')
elif c[1] == '3':
    print('1')
    
'''
['?', '2', '3'] => 4
['?', '3', '2'] => 1
['2', '?', '3'] => 14
['3', '?', '2'] => 14
['2', '3', '?'] => 1
['3', '2', '?'] => 4]
'''