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 2 9 10
pwr 7 10 2
pwr 7 4 7
iv 7 8
mu 8 2 9
mu 9 7 2
