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