Think before you make the move and good luck!

Railways are around our house and carry goods to other citys,there is very important for our business,we have to make train run tarwards the right place to carry corresponding goods.As a train conductor,your mission is simple but important:let train run to the the corresponding place to carry goods.Goods are in different color,only the train with same color can carry it.Think before you make the move and good luck!