#include <fstream>
#include <string>

int main() 
{
	ifstream in("allinall.in");
	string str1, str2;
	int pos;
	bool res = true;
	while(in >> str1) {
		res = true;
		in >> str2;
		for(unsigned i=0;i<str1.length();++i) {
			pos = str2.find(str1.c_str()[i]);
			if (pos == -1) {
				cout << "No" << endl;
				res = false;
				break;
			} else {
				str2 = str2.substr(pos+1,str2.length());
			}
		}
		if (res) cout << "Yes" << endl;
	}
}