#include <bits/stdc++.h>
using namespace std;
int sum;
bool check(int i){
    string t="";
    int k=i;
    while(k){
        char p=k%10+'0';
        t+=p;
        k/=10;
    }
    string t1=t;
    reverse(t1.begin(),t1.end());
    return t1==t;
}
int main(){
    freopen("palindrome.in","r",stdin);
    freopen("palindrome.out","w",stdout);

    int m;
    cin>>m;
    bool flag = false;
    for(int i=10000;i<=999999;i++){
        if(check(i)){
            sum = 0;
            int t=i;
            while(t>0){
                sum+=t%10;
                t/=10;
            }
            if(sum==m){
                cout<< i << endl;
                flag = true;
            }

        }
    }
    if(!flag) cout << -1;
    return 0;
}