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