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