#include "stdio.h"

int solve(char *s1,char *s2)
{
     int i1,i2,n;
     for(i1=0,i2=0;s1[i1]!='\0';i1++,i2++){
	  while(s1[i1]!=s2[i2]){
	       if(s2[i2]=='\0')  return 0;
	       i2++;
	  }
     }
     return 1;
}

main()
{
     int i1,i2,t,sum[10000];
     char  s1[10000],s2[10000];
     for(i1=0;
     scanf("%s %s",s1,s2)!=EOF;
     i1++)
	  sum[i1]=solve(s1,s2);
     for(i2=0;i2<i1;i2++){
	  if(sum[i1]==0)
	       printf("No\n");
	  else
	       printf("Yes\n");
     }
}