mu 1 2 3
mu 3 2 4
mu 4 2 5
mu 4 4 6
mu 6 3 7
pwr 4 7 8
iv 2 6
mu 6 8 7
mu 7 2 6
mu 8 6 7
mu 7 7 6
mu 2 6 9
mu 2 1 6
iv 6 7
mu 7 8 10
mu 10 6 7
mu 8 7 10
mu 10 10 7
mu 6 7 11
mu 5 3 6
mu 6 3 7
iv 7 6
mu 6 8 10
mu 10 7 6
mu 8 6 10
mu 10 10 6
mu 7 6 12
mu 9 11 1
mu 11 12 2