a escribir letras
a escribi letra
prepart inf n
a escribir letras .
a WORD_BOUNDARY e̞ s k ɾ i β i ɾ WORD_BOUNDARY l e̞ t ɾ a s WORD_BOUNDARY
a WORD_BOUNDARY e s c r i b i r WORD_BOUNDARY l e t r a s WORD_BOUNDARY . WORD_BOUNDARY