Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. At a historical landmark, candles are used to simulate an authentic atmosphere. A volunteer is currently putting new candles in the candle holders. On the east side, he replaced candles in 6 small candle holders and 7 large candle holders, using a total of 54 candles. On the west side, he replaced the candles in 20 small candle holders and 13 large candle holders, for a total of 118 candles. How many candles does each candle holder hold?