public class Main
{
   static final int MAX_LENGTH = 13; // about the biggest that will fit into long, use BigInteger for bigger values
   static long printValue(String s)
   {
      long result = 0;
      for (int i = 0; i < s.length(); i++)
         result += (long)Math.pow(27, MAX_LENGTH - i - 1)*(1 + s.charAt(i) - 'a');
      System.out.printf("%-20s = %20d\n", s, result);
      return result;
   }
 
   public static void main(String[] args)
   {
      printValue("a");
      printValue("aa");
      printValue("aaa");
      printValue("aaaa");
      printValue("aaaaa");
      printValue("abacus");
      printValue("abbreviation");
      printValue("account");
      printValue("accuracy");
      printValue("announcement");
      printValue("z");
   }
}

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