mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 3 7
iv 3 5
mu 5 1 9
mu 9 3 1
pwr 3 7 2
pwr 12 4 6
iv 6 5
mu 5 2 3
mu 3 6 2