#include <bits/stdc++.h>
using namespace std;
int t = 1;
void solve() {
  long long n, m, c = 0, d = 0;
  vector<long long> v;
  cin >> m;
  for (long long i = 1; i <= 1000001; i++) {
    long long a = i;
    while (a % 5 == 0) {
      a = a / 5;
      d++;
    }
    if (d == m) {
      v.push_back(i);
      c++;
    }
    if (d > m) break;
  }
  cout << c << "\n";
  if (c > 0) {
    for (auto e : v) cout << e << " ";
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  while (t--) {
    solve();
  }
}
