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
pwr 11 8 6
iv 6 7
mu 7 1 8
mu 8 6 1
pwr 23 9 8
iv 8 7
mu 7 5 4
mu 4 8 2
