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

int main()
{
    string A,B;cin>>A>>B;
    sort(A.begin(),A.end());
    bool ans=false;
    do
    {
        if(A==B)
        {
            ans=true;
            break;
        }
    }while(next_permutation(A.begin(),A.end()));
    if(ans)
    {
        cout<<"YES"<<endl;
    }
    else
    {
        cout<<"NO"<<endl;
    }
}