#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    string A,B; cin >> A >> B;
    vector<int> c(26,0);
    rep(i,A.size()) c[A[i]-'a']++;
    rep(i,B.size()) c[B[i]-'a']--;
    bool ok = true;
    rep(i,26) if(c[i] != 0) ok = false;
    cout << (ok?"YES":"NO") << endl;
}