#include<algorithm>

#include<cstring>

#include<cstdio>

#include<iostream>

#define len  101000  

using namespace std;

char s[len], t[len];

int main()

{

    int sn, tn, ls, lt;

    while (cin >> s) {

        cin >> t;

        ls = strlen(s);

        lt = strlen(t);

        sn = ;tn = ;

        for (int i = ;i < ls, i < lt;i++) {

            if (s[sn] == t[tn]) {

                sn++;

                tn++;

            }

            else {

                tn++;

            }

        }

        if (sn == ls)cout << "Yes" << endl;

        else cout << "No" << endl;

    }

    return ;

}