chor 1 2
chor 2 6
mu 1 2 3
chor 3 11
pwr 3 2 4
com 4 1 5
chor 5 1
com 1 2 6
chor 6 6
mu 3 3 7
iv 2 8
mu 1 8 9
mu 7 9 10
pwr 6 10 11
pwr 3 8 12
mu 11 12 13
chor 13 1