chor 1 2
chor 2 5
mu 1 2 3
mu 3 2 4
mu 4 2 5
chor 4 9
mu 5 2 6
mu 3 6 7
chor 7 4
mu 6 3 7
mu 7 3 8
mu 6 8 9
chor 9 3
mu 6 5 8
mu 8 7 9
mu 9 4 8
mu 8 3 9
chor 9 2
mu 4 7 8
mu 8 5 9
chor 9 3
mu 3 4 7
mu 7 6 8
mu 8 5 9
chor 9 7
