Mrs. Krashem, a driving instructor, has to arrange bookings for some of her pupils. She has 8 new pupils who wish to book either a morning or afternoon of a particular day. These are 2 hour introductory lessons, so she only sees one pupil each morning or afternoon. MS Banger is only available Tuesday AM but Mr Bumpem can make any time on a Wednesday. Mrs Exhaust is free on Tuesdays all day but Mr Hilstart is only free Wednesday afternoons. MS Boot is only available Friday AM whereas Miss Bonnet can only make Saturday PM. Mrs. Speed is available all day Fridays whereas Mr. Parker can make any time on a Saturday.