Program

#include <bits/stdc++.h>
 
using namespace std;
 
int main()
{
    ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    string s,t;
    cin >> s >> t;
    reverse(s.begin(),s.end());
    cout << ((s==t)?"YES":"NO") << '\n';
    return 0;
}

s,t=input(),input();print("YES"if t==s[::-1]else"NO")

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