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

int main() {
    string A, B;
    cin >> A;
    cin >> B;

    vector<int> dp(26, 0);
    for (char c : A) {
        ++dp[c - 'a'];
    }
    for (char c : B) {
        --dp[c - 'a'];
    }

    bool judge = true;
    for (int cnt : dp) {
        if (cnt) {
            judge = false;
            break;
        }
    }

    if (judge) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
}