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

int main() {
	string A, B;
	int C[26] = {};
	bool check = true;
	cin >> A >> B;
	for (int i = 0; i < A.size(); i++) {
		C[A[i] - 97]++;
	}
	for (int i = 0; i < B.size(); i++) {
		C[B[i] - 97]--;
	}
	for (int i = 0; i < 26; i++) {
		if (C[i] != 0) check = false;
	}
	if (check) cout << "YES" << endl;
	else cout << "NO" << endl;
}