#include <iostream>
#include <string>
using namespace std;
string s;
string t;
string::iterator sIter,tIter;
void sub(){
	int sLength=s.length();
	int tLength = t.length();
	for(sIter = s.begin(),tIter = t.begin();sIter!=s.end()&&tIter!=t.end();){
		if(*sIter == *tIter){
			sIter++;
			tIter++;
		}
		else{
			tIter++;
		}
	}
	if(sIter==s.end()){
		cout<<"Yes"<<endl;
	}
	else
		cout<<"No"<<endl;
}
int main(){
	while(cin>>s>>t){
		sub();
	}
	return 0;
}