MFEM mesh v1.0

dimension
2

elements
24
1 2 0 1 2
1 2 0 2 3
1 2 1 4 5
1 2 1 5 2
1 2 4 6 7
1 2 4 7 5
1 2 6 8 9
1 2 6 9 7
1 2 3 2 10
1 2 3 10 11
1 2 11 10 12
1 2 11 12 13
1 2 2 5 14
1 2 2 14 10
1 2 10 14 15
1 2 10 15 12
1 2 5 7 16
1 2 5 16 14
1 2 7 9 17
1 2 7 17 16
1 2 14 16 18
1 2 14 18 15
1 2 16 17 19
1 2 16 19 18

boundary
14
4 1 0 1
1 1 0 3
2 1 1 4
4 1 4 6
4 1 6 8
4 1 8 9
1 1 3 11
3 1 12 13
1 1 11 13
3 1 15 12
4 1 9 17
3 1 18 15
4 1 17 19
3 1 19 18

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