chor 1 2
chor 2 3
mu 1 2 3
chor 3 19
com 1 2 4
chor 4 9
mu 2 3 5
com 1 5 6
chor 6 3

pwr 3 3 7 #ababab
iv 2 8
mu 1 8 9 #ab^-1
mu 7 9 10
pwr 3 10 11
mu 11 9 12
mu 12 3 13
pwr 3 9 14
mu 13 14 15
mu 15 3 16
mu 16 9 17
mu 17 9 18
chor 18 1

mu 7 3 19
mu 19 14 20
mu 20 20 21
mu 21 9 22
chor 22 2