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