Score : 100 points

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