public class Stringmanipulator {
	public static void main (String args[]){
	String s;
	String r;
	int i;
	
	s= "hallo Otto";
	
	for (i=0; i<s.length();i++)
		System.out.println(s.charAt(i));
		
	
	
	r=s.substring(0,4);
	System.out.println(r);
	}
}