public class RecurseReverse{
    public static String reverse(String s){
        String rval;
        Trace.reverseIndent(s.length(),
             "entering reverse("+s+")");
        if (s.length()<=1)
            rval=s;
        else
            rval=reverse(s.substring(1))+s.charAt(0);
        Trace.reverseIndent(s.length(),
             "reverse("+s+")="+rval);
        return rval;
    }
    public static void main(String [] args){

        System.out.println(reverse("scoobydoo"));
    }
}
//