import sys
input=sys.stdin.readline
import itertools

X, Y = map(int, input().split())
l = [X,Y]
l.sort()
X_prime, Y_prime = l[0], l[1]
if abs((X_prime)-(Y_prime)) == 4:
    digit = [0,1,2,3,4,5,6,7,8,9,10,11]
    digit_list = digit*2
    keys = [0,1,2,3,4,5,6,7,8,9,10,11]*2
    d = dict(zip(keys,digit_list))
    print(d.get(keys[Y_prime+4]))
if abs((X_prime)-(Y_prime)) == 8:
    print(min(X_prime, Y_prime)+4)