#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
int main()
{
char s[100005],t[100005];
char *ps,*pt;
while(~scanf("%s%s",s,t))
{
ps=s;pt=t;
while(*pt)
{
if(*ps==*pt){*ps++;}
if(*ps=='\0'){cout<<"Yes"<<endl;break;}
*pt++;
}
if(*ps)//如果s没有移动到最后
cout<<"No"<<endl;
}
return 0;
}