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