#include <iostream>
#include <string>
using namespace std;


int main()
{

	string s,t;
	int i,j;
	while(cin>>s>>t)
	{
		for(i=0,j=0;j<t.size();j++)
		{
			if(s.at(i)==t.at(j))i++;
			if(i==s.size())break;
		}
		if(i==s.size())cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
	return 0;
}