Joe has 7 shirts and he ranks them: he has a favorite one, a
second favorite etc. Each day of the week (=7 days) he wears a new
one and the one worn that day goes to the laundry and stays in the
laundry for the remainder of the procedure.The new one is picked
randomly from those which are clean at that moment.
The following procedure starts on Monday: on any given day, if
Joe wears his favorite shirt, he...