The length of time for which a candle will burn is determined by the amount of wax that is used. Aman makes her own candles. The amount of wax that she used for each candle is 4 g for every hour that it needs to burn for, plus an additional 2 g. Aman wants to make two types of candle: some that will burn for seven hours and some that will burn for 12 hours. She uses 400 g of wax to make equal numbers of each candle. How many candles of each type will Aman make?