e ak kek kek kek
e ak kek kek kek .
e WORD_BOUNDARY  a k WORD_BOUNDARY k ɛ k WORD_BOUNDARY k ɛ k WORD_BOUNDARY k ɛ k WORD_BOUNDARY
e WORD_BOUNDARY a k WORD_BOUNDARY k e k WORD_BOUNDARY k e k WORD_BOUNDARY k e k WORD_BOUNDARY