#include <iostream>
#include <vector>
#include <fstream>
#include <queue>
#include <array>

struct Point {
  int x;
  int y;
};

int m = 0;
int r = 0;
std::vector<std::vector<int>> map;

bool validatePoint(const Point& point, int color) {
  int x = point.x;
  int y = point.y;
  bool flag = false;
  for (int i = 0; i < r; ++i) {
    std::array<int, 4> arr{map[y - i][x], map[y][x - i], map[y - r + 1][x - i], map[y - i][x - r + 1]};
    for (auto& p : arr) {
      if (p == -1) {
        return false;
      }
      if (color < p || p == 0) {
        flag = true;
      }
    }
  }
  if (flag) {
    for (int i = 0; i < r; ++i) {
      for (int j = 0; j < r; ++j) {
        if (map[point.y - i][point.x - j] == 0 || color < map[point.y - i][point.x - j]) {
          map[point.y - i][point.x - j] = color;
        }
      }
    }
  }
  return flag;
}

void validatePoints(std::queue<Point>& points, int color) {
  size_t size = points.size();
  for (size_t i = 0; i < size; ++i) {
    auto& point = points.front();
    if (validatePoint(point, color)) {
      points.emplace(point.x + 1, point.y);
      points.emplace(point.x - 1, point.y);
      points.emplace(point.x, point.y - 1);
      points.emplace(point.x, point.y + 1);
    }
    points.pop();
  }
}

int main() {
  std::ifstream input("input.txt");
  if (!input.good()) {
    std::cout << "File error: input.txt\n";
    return 1;
  }
  input >> m >> r;
  map.resize(m + 2);
  for (int i = 0; i < m + 2; ++i) {
    map[i].resize(m + 2);
  }
  for (int i = 0; i < m + 2; ++i) {
    map[0][i] = -1;
    map[i][0] = -1;
    map[m + 1][i] = -1;
    map[i][m + 1] = -1;
  }
  for (int i = 1; i < m + 1; ++i) {
    char c = 0;
    for (int j = 1; j < m + 1; ++j) {
      input >> c;
      map[i][j] = c == '.' ? 0 : -1;
    }
  }
  input.close();
  for (int i = 0; i < r; ++i) {
    for (int j = 0; j < r; ++j) {
      map[1 + i][1 + j] = 1;
    }
  }

  std::queue<Point> points;
  points.emplace(r + 1, r);
  points.emplace(r - 1, r);
  points.emplace(r, r + 1);
  points.emplace(r, r - 1);
  for (int color = 2;  !points.empty(); ++color) {
    validatePoints(points, color);
  }

  for (int i = 0; i < map.size(); ++i) {
    for (int j = 0; j < map.size(); ++j) {
      std::cout << map[i][j] << ' ';
    }
    std::cout << '\n';
  }

  std::ofstream output("output.txt");
  if (!output.good()) {
    std::cout << "File error: output.txt\n";
    return 1;
  }
  if (map[m][m] == 0) {
    output << "No";
  } else {
    output << map[m][m] - 1;
  }

  return 0;
}