B:	so it's maybe a hundred per grade.
b iː WORD_BOUNDARY s oʊ WORD_BOUNDARY ɪ t s WORD_BOUNDARY m eɪ b iː WORD_BOUNDARY ʌ WORD_BOUNDARY h ʌ n d ɹ ɪ d WORD_BOUNDARY p ɜː WORD_BOUNDARY ɡ ɹ eɪ d WORD_BOUNDARY