mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 5 8
mu 4 8 11
mu 3 8 9
mu 1 9 10
mu 10 4 2
mu 1 4 7
mu 3 7 8
mu 3 8 9
pwr 7 7 8
mu 1 6 7
pwr 11 9 1
pwr 20 7 9
mu 8 9 7
iv 7 8
mu 8 1 3
mu 3 7 1
pwr 15 11 3
iv 3 4
mu 4 2 5
mu 5 3 2