#include<stdio.h>
int main(){
  char a[11],b[11];
  int c[26]={0},i=0;
  scanf("%s%s",a,b);
  while(a[i]!='\0')
    c[a[i++]-'a']++;
  while(i){
    if(!c[b[i]-'a']){
      printf("NO\n");
      return 0;
    }else{
      c[b[i]-'a']--;
    }
    i--;
  }
  printf("YES\n");
  return 0;
}