Why don't you just go look them up in LIST_NATURAL.STB like I just did
371 1st Grade Apotrope
372 2nd Grade Apotrope
373 3rd Grade Apotrope
374 4th Grade Apotrope
375 5th Grade Apotrope
376 6th Grade Apotrope
377 7th Grade Apotrope
378 8th Grade Apotrope
379 9th Grade Apotrope
380 10th Grade Apotrope
Took all of 30 seconds