#include <bits/stdc++.h>
using namespace std;
double PI = acos(-1);
long long arr[1000005];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int m;
  cin >> m;
  vector<int> ans;
  for (int i = 0; i <= 1000000; i++) {
    int cnt = 0, k = i;
    while (k % 5 == 0 && k > 0) {
      cnt++;
      k /= 5;
    }
    arr[i] = cnt;
  }
  for (int i = 1; i <= 1000000; i++) arr[i] += arr[i - 1];
  for (int i = 0; i <= 1000000; i++) {
    if (arr[i] == m) ans.push_back(i);
  }
  cout << ans.size() << '\n';
  for (int i = 0; i < ans.size(); i++) cout << ans[i] << " ";
  return 0;
}
