#include <iostream>
#include <cstdio>
#include <vector>
#include <list>
#include <map>
#define rep(i, n) for(int (i)=0; (i)<(n); ++(i))
using namespace std;

map<char, int> get_map(string s) {
    map<char, int> m;
    rep(i, s.size()) {
        char c = s[i];
        if(m.count(c) == 0) {
            m[c] = 1;
        } else {
            m[c] += 1;
        }
    }
    return m;
}

int main()
{
    map<char, int> ma, mb;
    string sa, sb;
    getline(cin, sa);
    getline(cin, sb);
    cout << (get_map(sa) == get_map(sb) ? "YES" : "NO") << endl;
	return 0;
}