MESH2D
NUM_MATERIALS_PER_ELEM 3
ND      1   -10.0   -10.0     0.0
ND      2     0.0   -10.0    15.0
ND      3    10.0   -10.0     0.0
ND      4   -15.0     0.0    10.0
ND      5   -10.0     0.0    10.0
ND      6     0.0     0.0     5.0
ND      7    10.0     0.0    10.0
ND      8    15.0     0.0    10.0
ND      9   -10.0    10.0     0.0
ND     10     0.0    10.0    15.0
ND     11    10.0    10.0     0.0
E3T     1       1       2       5       0   8.333       0
E3T     2       2       5       6       1  10.000       1
E3T     3       2       6       7       1  10.000       0
E3T     4       2       3       7       0   8.333       1
E3T     5       3       7       8       0   6.666       0
E3T     6       7       8      11       0   6.666       1
E3T     7       7      10      11       0   8.333       0
E3T     8       6       7      10       1  10.000       1
E3T     9       5       6      10       1  10.000       0
E3T    10       5       9      10       0   8.333       1
E3T    11       4       5       9       0   6.666       0
E3T    12       1       4       5       0   6.666       1