Element #0
0: 4 13 5 19 0 21 7 15 8
Element #1
0: 5 14 6 21 1 23 8 16 9
Element #2
0: 7 15 8 20 2 22 10 17 11
Element #3
0: 8 16 9 22 3 24 11 18 12
========= Face restriction; marker: 4 ========
num_elem: 2, elem_size: 3, num_dof:  25
0: 7 19 4
0: 10 20 7
========= Face restriction; marker: 2 ========
num_elem: 2, elem_size: 3, num_dof:  25
0: 6 23 9
0: 9 24 12
========= Face restriction; marker: 1 ========
num_elem: 2, elem_size: 3, num_dof:  25
0: 4 13 5
0: 5 14 6
========= Face restriction; marker: 3 ========
num_elem: 2, elem_size: 3, num_dof:  25
0: 11 17 10
0: 12 18 11