otoko no ko to onna no ko
otoko no ko to onna no ko .
o t o k o WORD_BOUNDARY n o WORD_BOUNDARY k o WORD_BOUNDARY t o WORD_BOUNDARY o n n a WORD_BOUNDARY n o WORD_BOUNDARY k o WORD_BOUNDARY
o t o k o WORD_BOUNDARY n o WORD_BOUNDARY k o WORD_BOUNDARY t o WORD_BOUNDARY o n n a WORD_BOUNDARY n o WORD_BOUNDARY k o WORD_BOUNDARY