#include <bits/stdc++.h>
using namespace std;
const int INF = (int)2e9;
const long long INFL = (long long)9e18;
const int MAXINT = ((~0) ^ (1 << 31));
const long long MAXLL = ((~0) ^ ((long long)1 << 63));
template <class T>
inline T pow2(T a) {
  return a * a;
}
template <class T>
inline bool mineq(T& a, T b) {
  return (a > b) ? (a = b, true) : false;
}
template <class T>
inline bool maxeq(T& a, T b) {
  return (a < b) ? (a = b, true) : false;
}
int search(int m) {
  int cnt = 0;
  for (int i = 1; i < (int)(1000000); i++) {
    int tmp = i;
    while (tmp % 5 == 0) {
      tmp /= 5;
      m--;
    }
    if (m <= 0) return i;
  }
  return -1;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int m;
  cin >> m;
  int l = search(m), r = search(m + 1);
  cout << r - l << endl;
  for (int i = l; i < (int)(r); i++) cout << i << " ";
  cout << endl;
}
