#include "bits/stdc++.h"
using namespace std;
#define MAX 500

int dp[MAX];

int main(){
	string s;
	cin >> s;
	for (char c : s)
	{
		dp[c]++;
	}
	cin >> s;
	for (char c : s)
	{
		dp[c]--;
	}
	for (int i = 0; i < MAX; i++)
	{
		if (dp[i] != 0){
			cout << "NO" << endl;
			return 0;
		}
	}

	cout << "YES" << endl;
}