X, Y = map(int, input().split())
X, Y = 0, 4
Z_1 = (int(X+Y))/2
Z_2 = abs((int(X+Y))/2 - 6)
if X-Z_1 < X-Z_2:
    Z = Z_2
    print(Z)
else:
    Z = Z_1
    print(Z)