empat tambah dua enam
empat tambah dua enam .
ɛ m p a t WORD_BOUNDARY t a m b a h WORD_BOUNDARY d u a WORD_BOUNDARY  ɛ n a m WORD_BOUNDARY
e m p a t WORD_BOUNDARY t a m b a h WORD_BOUNDARY d u a WORD_BOUNDARY e n a m WORD_BOUNDARY