break_string.java

import java.util.*;
public class Main
{
	public static void main(String[] args) 
	{
		
		String str="ABCDEFGFIJKLMNOPQRSTUVWXYZ";
		int n=4;
		for(int i=0;i<str.length();i=i+n)
		{
		    if(i+n<str.length())
			  System.out.println(str.substring(i, i+n));
			else 
			   System.out.println(str.substring(i,str.length()));
		}

	}
}