#include<bits/stdc++.h>
using namespace std;

int main()
{
    int i,j;
    string s,t;
    while(cin>>s>>t)
    {
        int count=0;
        int len1=s.length();
        int len2=t.length();


            for(j=0;j<len2;j++)
            {
                if(s[count]==t[j]){
                    count++;
                    }
            }

        if(count==len1)
            printf("Yes\n");
        else
            printf("No\n");
    }
}