he+em he+em matiin
he em he em matiin .
h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY h ɛ WORD_BOUNDARY  ɛ m WORD_BOUNDARY m a t i i n WORD_BOUNDARY
h e WORD_BOUNDARY e m WORD_BOUNDARY h e WORD_BOUNDARY e m WORD_BOUNDARY m a t i i n WORD_BOUNDARY