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 5 5 10
mu 10 10 1

mu 3 3 10
mu 10 10 9
mu 10 3 11
mu 9 11 3

mu 7 7 9
mu 9 9 4

mu 8 8 9
mu 9 9 10
mu 9 10 6

mu 4 6 7

iv 7 6

mu 6 3 8
mu 8 7 2