5a

import java.util.Scanner;
import javax.swing.JOptionPane;
import java.lang.Math;
import java.io.*;
import java.util.*;

public class Main
{
	public static void main(String[] args) 
	{
		Scanner keyboard = new Scanner(System.in);
		System.out.println("enter a binary number");
		String binary = keyboard.nextLine();
        int bin_len = binary.length();
        int counter =0;
        for (int i=0;i<bin_len;i++)
        {
            String check_string = binary.substring(i,i+1);
            Boolean zero = check_string.contains("0");
            Boolean one = check_string.contains("1");
            if (zero)
            {
                counter++;
            }
            else if (one)
            {
                counter++;
            }
            else 
            {
                System.out.println("NOT BINARY");
                return;
            }
        }
        System.out.println(binary + " is binary");
	}
}