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