2854: ABC167A - Registration
          Memory Limit:128 MB
          Time Limit:1.000 S
         
      
      
        
          Judge Style:Text Compare
          Creator:
      
      
          Submit:0
          Solved:0
      
Description
	Time Limit: 2 sec / Memory Limit: 1024 MB
	 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.
	
	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.
        Sample Input Copy
chokudai
chokudaizSample Output Copy
Yes