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

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