public class Soned {

   public static void main (String[] ssssssssss)  {
      StringBuffer puhver = new StringBuffer();
      for (char c = 'a'; c <= 'z'; c++)
         puhver.append (c);
      String tulemus = puhver.toString();
      System.out.println (tulemus);
   } // main

} // Soned