one two three four five six seven eight
one two three four five six seven eight
det:num det:num det:num det:num det:num det:num det:num det:num
one two three four five six seven eight .
 WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY  WORD_BOUNDARY
o n e WORD_BOUNDARY t w o WORD_BOUNDARY t h r e e WORD_BOUNDARY f o u r WORD_BOUNDARY f i v e WORD_BOUNDARY s i x WORD_BOUNDARY s e v e n WORD_BOUNDARY e i g h t WORD_BOUNDARY . WORD_BOUNDARY