You eat five days per week at the same restaurant, and every day
you order a sandwich and a drink. There are 26 sandwiches including
6 vegetarian options, and 15 drinks including 4 caffeine-free
drinks. On Tuesdays, you like to eat healthy, so you always choose
a vegetarian sandwich and a caffeine free drink on Tuesdays. The
other days you can eat any sandwich and drink any drink - but you
never repeat a sandwich or a drink in the...