#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...)
#endif

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    string A, B;
    cin >> A >> B;
    ranges::sort(A);
    ranges::sort(B);
    cout << (A == B ? "YES" : "NO") << '\n';
}