a = [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23] b,c = input().split() b = int(b) c = int(c) d = [ [0] * 4 for _ in range(3) ] for i in range(len(a)): x = i//4 y = i%4 d[x][y] = a[i] print(d[b][c])