mu 1 2 3 mu 3 2 4 mu 3 4 5 mu 3 5 6 mu 1 6 7 mu 7 4 3 mu 3 5 7 pwr 5 7 1 iv 4 7 mu 4 1 3 mu 3 7 1 pwr 9 6 7 iv 7 6 mu 6 5 4 mu 4 7 2