nagai naigai nagai nagai
nagai naigai nagai nagai .
n a g a i WORD_BOUNDARY n a i g a i WORD_BOUNDARY n a g a i WORD_BOUNDARY n a g a i WORD_BOUNDARY
n a g a i WORD_BOUNDARY n a i g a i WORD_BOUNDARY n a g a i WORD_BOUNDARY n a g a i WORD_BOUNDARY