<?php

class Paiza {
    protected function getInput() {
        $array = [];
        while ($line = fgets(STDIN)) {
            if ($line !== '') {
                $array[] = trim($line);
            }
        }
        $input = [];
        foreach ($array as $key => $value) {
            $input[] = explode(" ", $value);
        }
        return $input;
    }
    protected function println($str) {
        echo $str."\n";
    }
    protected function key_max($array) {
        return max(array_keys($array));
    }
}

class B044 extends Paiza {

    private $state;

    public function __construct() {
        foreach ($input = parent::getInput() as $key => $line) {
            if ($key === 0 || $key === 1 || $key === parent::key_max($input)) continue;
            $tmp = str_split($line[0]);
            unset($tmp[0]);
            array_pop($tmp);
            $this->state[] = array_values($tmp);
        }
    }

    public function main() {
        foreach ($this->state as $row => $line) {
            foreach ($line as $col => $val) {
                if (preg_match('/^[1-9]$/', $val)) {
                    $this->explode($row, $col, $val);
                }
            }
        }
        $this->judge();
    }

    private function explode($row, $col, $power) {
        $stop_left = false;
        $stop_right = false;
        $stop_above = false;
        $stop_under = false;
        for ($i = 1; $i <= $power; $i++) {
            // 左に爆発
            if (array_key_exists($col - $i, $this->state[$row]) && !$stop_left) {
                if ($this->state[$row][$col - $i] === '#') {
                    $stop_left = true;
                } else if (preg_match('/^[X\.]$/', $this->state[$row][$col - $i])) {
                    $this->state[$row][$col - $i] = '.';
                }
            }
            // 右に爆発
            if (array_key_exists($col + $i, $this->state[$row]) && !$stop_right) {
                if ($this->state[$row][$col + $i] === '#') {
                    $stop_right = true;
                } else if (preg_match('/^[X\.]$/', $this->state[$row][$col + $i])) {
                    $this->state[$row][$col + $i] = '.';
                }
            }
            // 上に爆発
            if (array_key_exists($row - $i, $this->state) && !$stop_above) {
                if ($this->state[$row - $i][$col] === '#') {
                    $stop_above = true;
                } else if (preg_match('/^[X\.]$/', $this->state[$row - $i][$col])) {
                    $this->state[$row - $i][$col] = '.';
                }
            }
            // 下に爆発
            if (array_key_exists($row + $i, $this->state) && !$stop_under) {
                if ($this->state[$row + $i][$col] === '#') {
                    $stop_under = true;
                } else if (preg_match('/^[X\.]$/', $this->state[$row + $i][$col])) {
                    $this->state[$row + $i][$col] = '.';
                }
            }
        }
    }

    private function judge() {
        foreach ($this->state as $row => $line) {
            foreach ($line as $col => $val) {
                if ($val === 'X') {
                    parent::println('NO');
                    exit;
                }
            }
        }
        parent::println('YES');
    }
}

$b044 = new B044();
$b044->main();