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≤|S|≤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.