solution
MFEM mesh v1.0

dimension
2

elements
1
1 3 0 1 2 3

boundary
4
1 1 1 0
1 1 2 1
1 1 3 2
1 1 0 3

vertices
4

nodes
FiniteElementSpace
FiniteElementCollection: Quadratic
VDim: 2
Ordering: 0

0
1
1
0.1
0.5
0.9
0.5
0
0.45
0
0
1
0.9
-0.05
0.5
1
0.5
0.55

FiniteElementSpace
FiniteElementCollection: Quadratic
VDim: 1
Ordering: 0

0
0
0
0
0
0
0
0
1