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

#define FOR(i,a,b) for(int i=(a);i<(int)(b);i++)
#define rep(i,n) FOR(i,0,n)
#define ALL(x) (x).begin(),(x).end()

int main() {
    string s, t;
    cin >> s >> t;
    sort(ALL(s));

    bool f = false;
    do {
        if(s == t) f = true;
    } while (next_permutation(ALL(s)));

    puts(f ? "YES" : "NO");

    return 0;
}