Seven men, Anthony, Bob, Chris, Dan, Ed, Frank, and Greeg, have a day off every week, no two of them on the same day.
Anthony's day off is the day after Chris's
Dan's day off is three days after the day before Ed's
Bob's day off is three days before Greg's
Franks day off is half way between Bob's and Chris's and is on Thursday.
Which day off does each have?