inp 2
mu 1 2 3
iv 2 4
mu 1 4 5
mu 3 5 6
mu 2 6 7
mu 7 1 8
mu 8 8 9
mu 9 2 10
mu 5 5 11
mu 10 11 12
iv 1 14
iv 12 15
mu 14 15 16
mu 16 1 17
mu 17 12 13
oup 1 13
