import java.util.Vector;
import java.util.Enumeration;
public class VectorMain {
 public static void main(String [] args) {
     Vector v = new Vector(); //crear el vector
     for (char c='a';c<='z';c++) {//guadar en el vector
          String s = ""+c;
          v.addElement(s);
     }
     for (int i=0;i<v.size();i++) { //leer el vector
        Object o =v.elementAt(i);
        String r = (String) o;
        System.out.println(r.toUpperCase());
     }
     int i=1;
     for (char c='A';c<='Z';c++) {//guadar en el vector
          String s = ""+c;
          v.insertElementAt(s,i);
          i++;
     }
     Enumeration enum = v.elements();//enumerar todos los elementos
     while ( enum.hasMoreElements() ) {
        Object o= enum.nextElement();
        String r = (String) o;
        System.out.println(r);
     }
     

 }

}