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

int main() {
    vector<int> v(36, 0);

    string a, b;
    cin >> a >> b;
    for (char c : a) ++v[c - 'a'];
    for (char c : b) --v[c - 'a'];

    if (all_of(v.begin(), v.end(), [](int x) { return x == 0; })) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }

    return 0;
}