he+em he+em gantian
he em he em gantian .
h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY ɡ a n t i a n WORD_BOUNDARY
h e WORD_BOUNDARY e m WORD_BOUNDARY h e WORD_BOUNDARY e m WORD_BOUNDARY g a n t i a n WORD_BOUNDARY