#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main(){
    string word1,word2;
    cin >> word1>>word2;
    word2=word1;
    reverse(word1.begin(),word1.end());
    if(word1==word2)
    {
        cout<<"Yes";
    }
    else
    {
        cout<<"No"
    }
    return 0;
    
}