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

