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