//UVa10340 - All in All
//题目：判断s串是不是t串的子串。
//已AC
#include<stdio.h>
#include<string.h>
int main(){
  //freopen("data.in","r",stdin);
  char ch, s[100];
  while(scanf("%s",s) != EOF){
    scanf(" "); 
    int count=0; 
    //1.边读取边比较，往前推进
    while((ch=getchar())!='\n' && ch!=EOF) if(s[count]==ch) count++;
    //2.得到的正确字符个数
    if(count==(int)strlen(s)) printf("Yes\n");
    else printf("No\n");
    memset(s,0,sizeof(s));
  }
  return 0;
}

//输入样例：DI1=ge DI2=gweijie DO=YES   
//输入样例：DI1=ge DI2=weijie DO=NO