n=18;
m=6;
k=2;
tube=[|17,3,5|
15,0,4|];
X=[5,4,5,5,5,5,4,3,3,4,5,3,3,4,5,5,5,5];
Y=[3,5,5,4,3,2,2,2,3,1,4,1,2,4,5,5,4,5];