how many letters here
how many letter here
pro:int qn n adv
how many letters here ?
h aʊ WORD_BOUNDARY m ɛ n i WORD_BOUNDARY l ɛ ɾ ɚ z WORD_BOUNDARY h ɪ ɹ WORD_BOUNDARY
h o w WORD_BOUNDARY m a n y WORD_BOUNDARY l e t t e r s WORD_BOUNDARY h e r e WORD_BOUNDARY