Bar recommends us to drink 1 glass of water per standard drink, so we're not hungover tomorrow morning. Our fellow coders have bought us several drinks tonight in the form of a String. Return a String suggesting how many glasses of water we should drink to not be hungover.

Examples:
"1 beer" → "1 glass of water" because you drank one standard drink.
"1 shot, 5 beers, 2 shots, 1 glass of wine, 1 beer" → "10 glasses of water" because you drank ten standard drinks.