#include <bits/stdc++.h>

using namespace std;

//是不是同构数
bool isTongGou(int n) {
    int a = n * n;
    bool res = true;
    while (n) {
        int b = n % 10;
        n /= 10;

        int c = a % 10;
        a /= 10;
        if (b != c) {
            res = false;
            break;
        }
    }
    return res;
}

int main() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
        if (isTongGou(i)) cout << i << " ";

    return 0;
}