@@ -0,0 +1,159 @@
+package ru.revdaalex.calculator.interfaces;%0A%0A/**%0A * Input interface.%0A * Created by revdaalex on 15.06.2016.%0A */%0Apublic interface Input %7B%0A%0A    String read();%0A%7D%0A

add Input.java