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