```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n, m int
	fmt.Fscan(reader, &n, &m)
	grid := make([][]byte, n)
	for i := 0; i < n; i++ {
		line, _ := reader.ReadString('\n')
		line = strings.TrimSpace(line)
		grid[i] = []byte(line)
	}
	c := make([][]bool, n)
	for i := 0; i < n; i++ {
		c[i] = make([]bool, m)
	}
	for i := 1; i < n-1; i++ {
		for j := 1; j < m-1; j++ {
			allHash := true
		check:
			for dx := -1; dx <= 1; dx++ {
				for dy := -1; dy <= 1; dy++ {
					if dx == 0 && dy == 0 {
						continue
					}
					ni := i + dx
					nj := j + dy
					if grid[ni][nj] != '#' {
						allHash = false
						break check
					}
				}
			}
			if allHash {
				c[i][j] = true
			}
		}
	}
	possible := true
	for i := 0; i < n; i++ {
		for j := 0; j < m; j++ {
			if grid[i][j] == '#' {
				has := false
			checkhas:
				for dx := -1; dx <= 1; dx++ {
					for dy := -1; dy <= 1; dy++ {
						if dx == 0 && dy == 0 {
							continue
						}
						ni := i + dx
						nj := j + dy
						if ni >= 0 && ni < n && nj >= 0 && nj < m && c[ni][nj] {
							has = true
							break checkhas
						}
					}
				}
				if !has {
					possible = false
					break
				}
			}
		}
		if !possible {
			break
		}
	}
	if possible {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}
}
```