/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		boolean yn = true;
        while(yn)
        {
            System.out.println("please enter your name");
            char name = (char) System.in.read();
            
            System.out.println("name="+name);
            char next = (char)System.in.read();
			if(next==65535)
    			break;
    			
            switch(name)
            {
                case 'y':
                    yn = false;
                    break;
                case 'Y':
                    yn = false;
                    break;
                case 'n':
                    yn = false;
                    break;
                case 'N':
                    yn = false;
                    break;
                default:
                    System.out.println("You did not input a correct choice");
            }
        }
	}
}