#include <iostream>
#include <string>
#include <vector>
#include <cctype>
using namespace std;

int main() {
	
	string s1, s2;
	cin >> s1 >> s2;
	
	vector<int> count1(36);
	vector<int> count2(36);
	
	for (int i = 0; i < s1.size(); i++) {
		if (isalpha(s1[i])) {
			count1[s1[i] - 'a'] += 1;
		} else if (isdigit(s1[i])) {
			count1[s1[i] - '0' + 26] += 1;
		}
	}
	for (int i = 0; i < s2.size(); i++) {
		if (isalpha(s2[i])) {
			count2[s2[i] - 'a'] += 1;
		} else if (isdigit(s2[i])) {
			count2[s2[i] - '0' + 26] += 1;
		}
	}
	
	for (int i = 0; i < 36; i++) {
		if (count1[i] != count2[i]) {
			cout << "NO";
			return 0;
		}
	}
	
	cout << "YES";
	return 0;
}