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