itu bukan kupu+kupu
itu bukan kupu kupu .
i t u WORD_BOUNDARY b u k a n WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY
i t u WORD_BOUNDARY b u k a n WORD_BOUNDARY k u p u WORD_BOUNDARY k u p u WORD_BOUNDARY . WORD_BOUNDARY