mu 1 2 3 mu 3 2 4 mu 4 2 5 mu 5 2 6 mu 6 2 7 mu 7 2 8 mu 8 8 9 mu 9 3 10 mu 7 4 9 mu 9 5 11 iv 11 9 mu 9 10 12 mu 12 11 2