#include <bits/stdc++.h>;
using namespace std;
int main(){
    int n,i;
    int q,b,s,g;
    cin>>n;
    for(i=1000;i<=n;i++){
        q=i/1000;
        b=i/100%10;
        s=i/10%10;
        g=i%10;
        if(q==s&&b==g&&i%2==1){
            cout<<i<<endl;
        }
    }
}
/**************************************************************
	Problem: 1737
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/