import java.util.*;

public class NumberPalindrome {
    static ArrayList<Integer> list = new ArrayList<Integer>();
public static   ArrayList<Integer> findPalindromes(){
             for (int i=100; i<=1000; i++){
             Integer in=new Integer(i);
             String number=in.toString();
             int index1=0;
             int index2=number.length()-1;
             char x=number.charAt(index1);
             char y=number.charAt(index2);
             while (index2-index1>=0){
             if(x!=y)
             break;
             if (index2-index1==0 || index2-index1==1)
             list.add(i);
             index1++;
             index2--;
             x=number.charAt(index1);
             y=number.charAt(index2);
             }
          }
          return list;
       }
    public static void main(String[] args) {
   ArrayList l=findPalindromes();
   for(int i=0;i<l.size();i++){
       System.out.println(l.get(i));
   }
    }
}