sini bikin batu+batuan
sini bikin batu batuan .
s i n i WORD_BOUNDARY b i k i n WORD_BOUNDARY b a t u WORD_BOUNDARY b a t u a n WORD_BOUNDARY
s i n i WORD_BOUNDARY b i k i n WORD_BOUNDARY b a t u WORD_BOUNDARY b a t u a n WORD_BOUNDARY . WORD_BOUNDARY