aaa aaa Ais bisa di
aaa aaa ais bisa di .
a a a WORD_BOUNDARY  a a a WORD_BOUNDARY  a i s WORD_BOUNDARY b i s a WORD_BOUNDARY d i WORD_BOUNDARY
a a a WORD_BOUNDARY a a a WORD_BOUNDARY a i s WORD_BOUNDARY b i s a WORD_BOUNDARY d i WORD_BOUNDARY