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