mu 1 2 3
mu 3 2 4
mu 3 4 5
mu 3 5 6
mu 6 3 7
mu 7 4 8
mu 3 8 9
mu 9 4 10
mu 3 10 8
mu 8 8 2
mu 7 7 8
iv 8 9
mu 9 1 10
mu 10 8 1
mu 3 6 7
mu 7 7 8
mu 7 8 9
mu 8 9 3
iv 3 4
mu 4 2 5
mu 5 3 2
