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 8 8 11
mu 11 8 10

mu 9 10 6

iv 6 7
mu 7 3 8
mu 8 6 2