#include<bits/stdc++.h>
using namespace std;
#define rep(i, N) for(i = 0; i < N; i++)
#define ll long long

int main(void) {
    string S;
    
    ll i, j, k;

    cin >> S;

    ll N=stoll(S);
    while(N%100!=99)N+=stoll(S);

    S=to_string(N);

    while(S.size()<9){
        string T=S;
        reverse(T.begin(),T.end());
        S=T+S;
    }

    cout<<S<<endl;

    return 0;
}