#include <bits/stdc++.h>
using namespace std;
char _;
string s;
int n, first, v;
int main() {
  cin >> s;
  n = s.size();
  cout << "......\n";
  for (int l = 0; l < n; ++l) {
    first = s[l];
    while (v != first + 1) {
      v = (v + 255) % 256;
      cout << "X.....\n";
      cout << "......\n";
    }
    --v;
    cout << "X.....\n";
    cout << "X.....\n";
    cout << "......\n";
  }
  return 0;
}
