mu 1 2 3
mu 3 2 4
mu 4 2 5
mu 2 2 6
mu 5 3 7
pwr 5 7 8
mu 6 4 9
iv 9 10
mu 10 8 11
mu 11 9 12
mu 8 12 10
pwr 5 10 11
mu 9 11 1
mu 4 3 9
mu 9 4 10
iv 10 9
mu 9 8 11
mu 11 10 9
mu 8 9 10
pwr 15 10 9
mu 7 9 2