设计一个简单的数字电路用于电子卖报机，要求如下：
报纸价格为1.5元；投币器只接受5角和1元硬币；投币器不找零。当投入金额合适时，报纸出口打开，否则关闭。用Verilog完成设计。(The design of a simple digital circuit for electronic selling machine, the following:
The price is 1.5 yuan; the coin only accept 5 cents and $1 coin coin does not change. When the amount of input is suitable, the export of the newspaper is opened, otherwise it will be closed. Use Verilog to complete the design.)