he+eh ni he+eh pas
he eh ni he eh pas .
h ɛ WORD_BOUNDARY  ɛ h WORD_BOUNDARY n i WORD_BOUNDARY h ɛ WORD_BOUNDARY  ɛ h WORD_BOUNDARY p a s WORD_BOUNDARY
h e WORD_BOUNDARY e h WORD_BOUNDARY n i WORD_BOUNDARY h e WORD_BOUNDARY e h WORD_BOUNDARY p a s WORD_BOUNDARY