ara ara himo ga kireta
ara ara himo ga kireta .
a r a WORD_BOUNDARY a r a WORD_BOUNDARY h i m o WORD_BOUNDARY g a WORD_BOUNDARY k i r e t a WORD_BOUNDARY
a r a WORD_BOUNDARY a r a WORD_BOUNDARY h i m o WORD_BOUNDARY g a WORD_BOUNDARY k i r e t a WORD_BOUNDARY