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