import java.io.*;
import java.util.*;

public class allinall {
	public static void main(String[] args) throws Exception {
		BufferedReader in=new BufferedReader(new FileReader("allinall.in"));
		
		while(true) {
			String line=in.readLine();
			if(line==null)
				break;
			StringTokenizer st=new StringTokenizer(line);
			String s1=st.nextToken();
			String s2=st.nextToken();
			
			boolean match=false;

			for(int i=0;i<s1.length();i++) {
				match=false;
				for(int j=0;j<s2.length();j++) {
					if(s1.charAt(i)==s2.charAt(j)) {
						s2=s2.substring(j+1);
						match=true;
						break;
					}
				}
				if(!match)
					break;
			}

			//Ausgabe:
			if(match)
				System.out.println("Yes");
			else
				System.out.println("No");
			
			
		}
	}
}