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