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