All lines have the same format:
ELEMENT-NO NODE1 NODE2 NODE3 - the three nodes forming triangle ELEMENT-NO.
1 1 2 204 !ELEMENT-NO NODE1 NODE2 NODE3 - the three node numbers for triangle 1 2 1 204 126 !ELEMENT-NO NODE1 NODE2 NODE3 - the three node numbers for triangle 2 3 2 3 204 4 3 4 203 5 3 203 204 ... 792 466 468 472 793 468 469 471 794 468 471 472 795 469 470 471