#include <bits/stdc++.h>
using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  string S;
  cin >> S;

  int L = (int)S.size();
  int N = L + 5;
  vector<string> G(N, string(N, '#'));
  G[0][0] = '.';
  G[N - 1][N - 1] = '.';

  for (int i = 1; i <= L; i++) {
    int r, c;
    if (i % 2 == 1) {
      int q = (i - 1) / 2;
      int base = 2 * q;
      r = base + 2;
      c = base;
      for (int rr = base; rr <= base + 2; rr++) G[rr][c] = '.';
    } else {
      int q = (i - 2) / 2;
      int base = 2 * q;
      r = base + 2;
      c = base + 2;
      for (int cc = base; cc <= base + 2; cc++) G[r][cc] = '.';
    }

    if (S[i - 1] == 'x') continue;

    if (i % 2 == 1) {
      for (int rr = r; rr < N; rr++) G[rr][c] = '.';
      for (int cc = c; cc < N; cc++) G[N - 1][cc] = '.';
    } else {
      for (int cc = c; cc < N; cc++) G[r][cc] = '.';
      for (int rr = r; rr < N; rr++) G[rr][N - 1] = '.';
    }
  }

  cout << N << '\n';
  for (string row : G) cout << row << '\n';
  return 0;
}