chor 1 2
chor 2 4
mu 1 2 3
chor 3 12
mu 3 2 4
mu 4 2 5
mu 3 4 6
mu 6 4 7
chor 7 3
mu 5 4 7
mu 6 7 4
chor 4 3
mu 3 3 4
mu 4 5 6
mu 6 6 7
mu 7 4 5
iv 5 4
mu 1 4 6
mu 1 5 7
mu 6 7 3
chor 3 1