ni ini bisa masuk nih
ni ini bisa masuk nih !
n i WORD_BOUNDARY i n i WORD_BOUNDARY b i s a WORD_BOUNDARY m a s u k WORD_BOUNDARY n i h WORD_BOUNDARY
n i WORD_BOUNDARY i n i WORD_BOUNDARY b i s a WORD_BOUNDARY m a s u k WORD_BOUNDARY n i h WORD_BOUNDARY ! WORD_BOUNDARY