1. \u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
1. 如果你确实需要使用左序操作也可以，你只需要自己写操作代码。
So if you absolutely need to be left-handed you can do so, you`ll just need to do some of the calculations yourself.