sini sini mundur mundur
sini sini mundur mundur .
s i n i WORD_BOUNDARY s i n i WORD_BOUNDARY m u n d u r WORD_BOUNDARY m u n d u r WORD_BOUNDARY
s i n i WORD_BOUNDARY s i n i WORD_BOUNDARY m u n d u r WORD_BOUNDARY m u n d u r WORD_BOUNDARY . WORD_BOUNDARY