Problem Statement

Takahashi wants to be a member of some web service.

He tried to register himself with the ID $S$, which turned out to be already used by another user.

Thus, he decides to register using a string obtained by appending one character at the end of $S$ as his ID.

He is now trying to register with the ID $T$. Determine whether this string satisfies the property above.

Constraints

• $S$ and $T$ are strings consisting of lowercase English letters.
• $1 \\leq |S| \\leq 10$
• $|T| = |S| + 1$

Input

Input is given from Standard Input in the following format:

$S$ $T$

Output

If $T$ satisfies the property in Problem Statement, print Yes; otherwise, print No.

Sample Input 1

chokudai
chokudaiz

Sample Output 1

Yes

chokudaiz can be obtained by appending z at the end of chokudai.

Sample Input 2

snuke
snekee

Sample Output 2

No

snekee cannot be obtained by appending one character at the end of snuke.

Sample Input 3

a
aa

Sample Output 3

Yes