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

