X,Y=map(int,input().split())
tr=map(set,[
    {0,4,8},
    {1,5,9},
    {2,6,10},
    {3,7,11}    
])

for t in tr:
    if X in t:
        t.remove(X)
        t.remove(Y)
        print(list(t)[0])
        exit()