with open("input2_pre.txt") as f:
    s = 0
    for line in f.readlines():
        a, b = [int(a) for a in line.strip().split()]
        b = {
            (1, 1): 3,
            (1, 2): 1,
            (1, 3): 2,
            (2, 1): 1,
            (2, 2): 2,
            (2, 3): 3,
            (3, 1): 2,
            (3, 2): 3,
            (3, 3): 1,
        }[(a, b)]
        s += b + ((3, 0, 6)[((a - b) % 3)])
    print(s)