b b b b b b b b b
b b b b b b b b b .
b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY
b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY b WORD_BOUNDARY . WORD_BOUNDARY