he+eh dibalik dibalik
he eh dibalik dibalik .
h ɛ WORD_BOUNDARY  ɛ h WORD_BOUNDARY d i b a l i k WORD_BOUNDARY d i b a l i k WORD_BOUNDARY
h e WORD_BOUNDARY e h WORD_BOUNDARY d i b a l i k WORD_BOUNDARY d i b a l i k WORD_BOUNDARY