chor 1 2
chor 2 7
mu 1 2 3
chor 3 17
com 1 2 4
chor 4 6
pwr 3 2 5
com 1 5 6
chor 6 5
iv 2 7
mu 1 7 8 # ab^-1
mu 2 3 9
mu 9 8 10
mu 3 3 11  # abab
mu 10 11 12
com 1 12 13
chor 13 1
mu 3 2 14  # ab^2
mu 8 7 15 # ab^-2
mu 15 7 16 # ab^-3
mu 11 11 17
mu 17 14 18
mu 18 16 19
mu 19 11 20
mu 20 8 21
mu 21 14 22
mu 22 2 23
mu 23 15 24
mu 24 14 25
chor 25 1