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