mu 1 2 3 mu 3 2 4 mu 3 4 5 mu 3 5 6 mu 6 3 7 mu 7 4 8 mu 3 8 9 mu 8 3 10 pwr 3 8 2 mu 8 3 4 iv 4 5 mu 4 1 6 mu 6 5 1 pwr 20 9 8 iv 8 7 mu 7 2 3 mu 3 8 2