public static boolean checkSequence(String s,String t)

{

int index=0,count=0;

for(int i=0;i<s.length();i++)

{

for(int j=index;j<t.length();j++)

{

if(s.charAt(i)==t.charAt(j))

{

count++;

index=j;

index++;

break;

}

}

}

return count==s.length();

}

public static void main(String[] args)

{

Scanner read = new Scanner(System.in);

String s,t;

while(read.hasNext())

{

s= read.next();

t=read.next();

if(checkSequence(s,t)){

System.out.println("Yes");

}else{

System.out.println("No");

}

}

read.close();

}

}