#include <bits/stdc++.h>
using namespace std;
vector<long long> z;
void pr() {
  long long i, x, y, s;
  for (i = 1; i <= 500000; i++) {
    x = 1;
    y = 5;
    s = 0;
    while (x) {
      x = i / y;
      s += x;
      y *= 5;
    }
    z.push_back(s);
  }
}
int main() {
  long long n, i, s = 0;
  cin >> n;
  pr();
  vector<long long> p;
  for (i = 0; i < 500000; i++) {
    if (z[i] == n) {
      s++;
      p.push_back(i + 1);
    }
  }
  cout << s << "\n";
  if (s) {
    for (i = 0; i < s; ++i) cout << p[i] << " ";
  }
  return 0;
}
