No._material_props:    4
    S_0:   10.
    e_0:   0.001
    n:  10
   Poissons_ratio: 0.3
No._coords_per_node:   2
No._DOF_per_node:      2
No._nodes:             4
Nodal_coords
    0.0   0.0
    1.0   0.0
    1.0   1.0
    0.0   1.0
No._elements:                       1
Max_no._nodes_on_any_one_element:   4
element_identifier; no._nodes_on_element; connectivity:
    1  4  1 2 3 4
No._nodes_with_prescribed_DOFs:  4
Node_#, DOF#, Value:
   1 1 0.0
   1 2 0.0
   2 2 0.0
   4 1 0.0
No._elements_with_prescribed_loads: 1
Element_#, Face_#, Traction_components,
  1 2 20.0 0.0