import javax.swing.JOptionPane;


public class Demo1
{
	public static void main(String[] args)
	{
		int i =0;
		boolean check= true;
		while(i<5)
		{
			i++;
			if(i==3 && check) break;
			//if(i==3 && check) continue;
			System.out.print(i);
		}
		System.out.println();
	}
}