mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 2 4 7
mu 6 2 8
pwr 6 8 1
mu 5 5 9
mu 5 9 2
pwr 9 7 8
iv 8 9
mu 9 1 7
mu 7 8 1
mu 4 6 7
pwr 27 7 8
mu 6 4 3
pwr 49 3 4
mu 8 4 5
iv 5 6
mu 6 2 7
mu 7 5 3
mu 3 3 2