#include <bits/stdc++.h>
using namespace std;
int mas[1010][1010];
int mas1[1001][1001];
bool check(int i, int j) {
  return mas[i][j] && mas[i + 1][j] && mas[i + 2][j] && mas[i + 2][j + 1] &&
         mas[i + 2][j + 2] && mas[i + 1][j + 2] && mas[i][j + 2] &&
         mas[i][j + 1];
}
void draw(int i, int j) {
  mas1[i][j] = mas1[i + 1][j] = mas1[i + 2][j] = mas1[i + 2][j + 1] =
      mas1[i + 2][j + 2] = mas1[i + 1][j + 2] = mas1[i][j + 2] =
          mas1[i][j + 1] = 1;
}
int main() {
  int n, m;
  cin >> n >> m;
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= m; ++j) {
      char temp;
      cin >> temp;
      if (temp == '#')
        mas[i][j] = 1;
      else
        mas[i][j] = 0;
    }
  for (int i = 1; i <= n - 2; ++i)
    for (int j = 1; j <= m - 2; ++j) {
      if (check(i, j)) draw(i, j);
    }
  bool f = 1;
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= m; ++j) {
      if (mas[i][j] && !mas1[i][j]) f = 0;
    }
  if (f)
    cout << "YES";
  else
    cout << "NO";
  return 0;
}
