segmentation: 3 turnoff words
rank.candidate: 3 turnoff w ords 3 turn of fwords 3 turnoff w or ds 3turnoff words 3 turnof f words 3 tu rn off words 3turn off words 3 turnoff wo rds 3 tur no ff words 3 turnoff words 3 turn off words 3 turn offwords 3 turnoff wor ds 3 tur n off words 3 turno ff words 3 turn of f words 3t urn off words 3 turnoff word s 3tur n off words 3turnof f words