You are given three strings A, B and C. Check whether they form a word chain.

More formally, determine whether both of the following are true:

* The last character in A and the initial character in B are the same.
* The last character in B and the initial character in C are the same.



If both are true, print `YES`. Otherwise, print `NO`.

Constraints

* A, B and C are all composed of lowercase English letters (`a` - `z`).
* 1 ≤ |A|, |B|, |C| ≤ 10, where |A|, |B| and |C| are the lengths of A, B and C, respectively.

Input

Input is given from Standard Input in the following format:


A B C


Output

Print `YES` or `NO`.

Examples

Input

rng gorilla apple


Output

YES


Input

yakiniku unagi sushi


Output

NO


Input

a a a


Output

YES


Input

aaaaaaaaab aaaaaaaaaa aaaaaaaaab


Output

NO
<?php
while($input = fgets(STDIN)){
    // 空欄のとき代入回避
    if(trim($input)){
        $tmp_array = explode(' ', trim($input));
        $words[] = $tmp_array[0];
        $words[] = $tmp_array[1];
      	$words[] = $tmp_array[2];
    }
}

for ($i = 0; $i < count($words) - 1; $i++) {
    $firstString = $words[$i];
    $secondString = $words[$i + 1];
    if (substr($firstString, mb_strlen($firstString) - 1, 1) !== substr($secondString, 0, 1)) {
        echo 'NO';
        return;
    }
}
echo 'YES';