import java.io.PrintStream;
import java.util.Scanner;

public class Kangaroo
{
   public static void main(String[] args)
   {
      PrintStream output = System.out;
      Scanner input = new Scanner(System.in);
      
      output.print("Enter two words, or Ctrl-d to quit: ");
      for (; input.hasNext(); )
      {
         String kangaroo = input.next().toLowerCase();
         String joey = input.next().toLowerCase();
         
         StringBuffer result = new StringBuffer(kangaroo);
         boolean isKangaroo = true;
         int prevIndex = 0;
         for (int i = 0; i < joey.length() && isKangaroo; i++)
         {
            char c = joey.charAt(i);
            int index = kangaroo.indexOf(c, prevIndex);
            if (index != -1)
            {
               result.setCharAt(index, Character.toUpperCase(c));
               prevIndex = index + 1;
            }
            else
            {
               isKangaroo = false;
            }
         }
         
         if (isKangaroo)
         {
            output.printf("%s is a kangaroo word%n%n", result, joey);
         }
         else
         {
            output.println("not a kangaroo word\n");
         }
         output.print("Enter two words, or Ctrl-d to quit: ");
      }
   }
}