msd_2 msd_6 0 0 0 * -> 0 1 1 -> 1 1 2 -> 2 1 3 -> 3 1 4 -> 4 1 5 -> 5 1 1 0 * -> 1 2 2 0 * -> 2 3 3 0 * -> 3 4 4 0 * -> 4 5 5 0 * -> 5