he+em he+em iya iya
he em he em iya iya .
h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY i j a WORD_BOUNDARY  i j a WORD_BOUNDARY
h e WORD_BOUNDARY e m WORD_BOUNDARY h e WORD_BOUNDARY e m WORD_BOUNDARY i y a WORD_BOUNDARY i y a WORD_BOUNDARY