UVA 10340

#include<iostream>
#include<string>
#include<cstdio>
using namespace std;
//判断a是不是b的子串 
int main(){
   string a,b;
   while(cin>>a>>b){
       int i=0,j=0,len_a,len_b;
       len_a=a.length();
       len_b=b.length();
       if(len_a>len_b)
            printf("No\n");
       else{
           while(i<len_a&&j<len_b){
               if(a[i]==b[j]){
                   i++;
                   j++;
               }else{
                   j++;
               }
           }
           if(i==len_a)
               printf("Yes\n");
           else
               printf("No\n");
       }//end else
   }
}