mu 1 2 3 mu 3 2 4 mu 3 4 5 mu 3 5 6 mu 6 3 7 mu 6 7 8 pwr 12 8 1 pwr 3 5 2 pwr 3 4 5 iv 5 6 mu 6 2 7 mu 7 5 2 iv 3 4 mu 4 1 5 mu 5 3 1