#include <iostream>
#include <string>
#include <map> 

using namespace std;

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

    for (int i = 0; i < A.length(); i++) {
        char A_char = A.at(i);
        size_t index = B.find(A_char);
        if (index == string::npos) {
            cout << "NO" << endl;
            return 0;
        }
        B = B.replace(index, 1, " ");
    }
    cout << "YES" << endl;
    return 0;
}