ni kupu+kupu kupu+kupu
ni kupu kupu kupu kupu .
n i WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY
n i WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY . WORD_BOUNDARY