aku aku batu biru ni
aku aku batu biru ni .
a k u WORD_BOUNDARY  a k u WORD_BOUNDARY b a t u WORD_BOUNDARY b i r u WORD_BOUNDARY n i WORD_BOUNDARY
a k u WORD_BOUNDARY a k u WORD_BOUNDARY b a t u WORD_BOUNDARY b i r u WORD_BOUNDARY n i WORD_BOUNDARY