#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 = 0;tn = 0;
        for (int i = 0;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 0;
}