#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: admin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/