mu 1 2 3
mu 3 2 4
mu 2 2 5
mu 5 2 6
mu 5 5 7
mu 7 7 8
mu 8 8 9
pwr 14 2 10
mu 3 8 1
mu 4 3 11
mu 3 9 12
mu 4 8 13
mu 4 7 14
mu 7 13 15
mu 15 15 16
mu 5 16 17
mu 17 11 18
iv 18 16
mu 12 11 17
mu 16 17 15
mu 15 18 2
mu 6 4 16
mu 16 5 15
mu 15 12 16
mu 16 9 15
mu 15 3 16
mu 16 7 19
pwr 3 14 15
iv 19 16
mu 16 15 17
mu 17 19 3
oup 3 1 2 3