#include <stdio.h>
int main(){
char a[11]={},b[11]={};
int i=0,j;
scanf("%s%s",a,b);
while(a[i]){
	j=-1;
	while(++j<10)if(b[j]==a[i]){b[j]=0;i++;break;}
	if(j==10)break;
}
printf(a[i]?"NO":"YES");
return 0;
}