A baseball coach takes her team out for pizza every time they win a game. Not everyone can come each time, so he orders
the pizzas based on how many players are coming. After last
week's victory, he bought 3 medium pizzas and a large pizzas,
the perfect amount for the 19 players going out for pizza. This
week, there were 14 players going, so he ordered 3 medium
pizzas and 1 large pizza, which was also just the right amount.
How many people does each size of pizza feed?