#include <bits/stdc++.h>

using namespace std;

int main(){
  char a[10],b[10];
  scanf("%s",a);
  scanf("%s",b);
  int i = 0, j = 0;
  while(a[i] != 0){
    j = 0;
    while(b[j] != 0){
      if(a[i] == b[j]){
        a[i] = '0';
        b[j] = '0';
        break;
      }
      j++;
    }
    i++;
  }
  i = 0;
  while(a[i] != 0){
    if(a[i] != '0'){
      cout << "NO" << endl;
      return 0;
    }
    i++;
  }
  cout << "YES" << endl;
  return 0;
}