ChangeTheWolrd.java

package homeWork1;

public class ChangeTheWolrd {

	public static void main(String[] args) {
	
		String s="Education is the most powerful weapon which you can use to change the world.";
		String t="An investment in knowledge pays the best interest.";
		
		System.out.print("\""+s.substring(s.indexOf("use"),s.indexOf("use")+"use".length())+" "+
		                 t.substring(t.indexOf("knowledge"),t.indexOf("knowledge")+"knowledge".length())+" "+
		                 s.substring(s.indexOf("to"),s.length()-1)+"\"");

	}

}