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