Some test are given “OPEN BOOK” but they are usually even harder – unless you know where to look it up.
Sometimes one can use a key but meaningless sentenceto jog the memory. One I remember from HS:THE SUFFERING SOFT-HAMMED OX CLUMB THE SOUTH DOOR OF THE CORRIDOR IN THE CHEVROLET.
From that comes the following list:SuffolkShrophshireHampshireOxfordColumbiaSouthdownDorsetCorriedaleCheviot
Amazing how the mind can remember ridiculous sentences.