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