what letters are there
what letter be there
pro:int n cop adv
what letters are there ?
w ʌ t WORD_BOUNDARY l ɛ ɾ ɚ z WORD_BOUNDARY ɑː ɹ WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY
w h a t WORD_BOUNDARY l e t t e r s WORD_BOUNDARY a r e WORD_BOUNDARY t h e r e WORD_BOUNDARY