chor 1 2
chor 2 5
mu 1 2 3
chor 3 14
com 1 2 4
chor 4 7
mu 3 2 5  cd^2
iv 2 6
mu 1 6 7 cd^-1
mu 7 6 8 cd^-2
mu 3 3 9
mu 8 8 10
mu 9 10 11
chor 11 3
mu 2 3 12
com 1 12 13
chor 13 3
mu 9 5 14
pwr 3 14 15
mu 15 7 18
mu 18 9 19
mu 19 7 20
mu 20 5 21
chor 21 1