#include <stdio.h>#include <string.h>
int main(int argc, char* argv[]){
char s[100000]; char t[100000]; int slen; int count; int i,j;
while((scanf("%s",s) != EOF) && (scanf("%s",t) != EOF)) { slen = strlen(s); count = 0;
for(i=0,j=0;s[i]!='/0'&&t[j]!='/0';) { if(s[i] == t[j]) { count++; i++; j++;
} else { j++; } }
if(count == slen) { printf("Yes/n"); } else { printf("No/n"); } }
return 0;}