#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <cstdio>
using namespace std;
int main()
{
    string str1,str2;
    while(cin>>str1>>str2){
        vector<int>v1(30),v2(30);
        for(int i=0;i<str1.size();++i)v1[str1[i]-'A']++;
        for(int i=0;i<str2.size();++i)v2[str2[i]-'A']++;
        sort(v1.begin(),v1.end());
        sort(v2.begin(),v2.end());
        if(v1==v2)cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
    }
    return 0;
}