MFEM mesh v1.0

dimension
2

elements
11
1 3 0 1 2 3
1 3 4 5 6 7
1 3 5 8 9 6
1 3 3 2 10 11
1 3 11 10 12 13
1 3 2 7 14 10
1 3 10 14 15 12
1 3 7 6 16 14
1 3 6 9 17 16
1 3 14 16 18 15
1 3 16 17 19 18

boundary
16
3 1 0 1
3 1 1 2
1 1 0 3
3 1 4 5
3 1 4 7
3 1 5 8
2 1 8 9
1 1 3 11
3 1 13 12
1 1 11 13
3 1 2 7
3 1 12 15
2 1 9 17
3 1 15 18
2 1 17 19
3 1 18 19

vertices
20
2
-2.500000e+00 0
-5.000000e-01 0
-5.000000e-01 1
-2.500000e+00 1
5.000000e-01 0
2.750000e+00 0
2.750000e+00 1
5.000000e-01 1
5 0
5 1
-5.000000e-01 2
-2.500000e+00 2
-5.000000e-01 3
-2.500000e+00 3
5.000000e-01 2
5.000000e-01 3
2.750000e+00 2
5 2
2.750000e+00 3
5 3