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