points
8
0.0 -1.5 0
0.0 -2.0 0
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1.0 -2.5 0
1.5 -2.0 0
1.5 -1.5 0
0.0  3.0 0
2.0  3.0 0
end points
lines
7
0 1
1 2
2 3
3 4
4 5
5 6
6 7
end lines