Codeforces_41A

//Codeforces Round 41A
#include <string>
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
    int len;
    char mass1[101], mass2[101];
    string s1, s2, s3;
    cin >> s1 >> s2;
    len = s1.size();
    strcpy(mass1, s1.c_str());
    strcpy(mass2, s2.c_str());
    for(int i=len-1;i>=0;i--)
    {
        s3 += mass1[i];
    }
    if(s3==s2){cout<<"YES";}
    else{cout<<"NO";}
    return 0;
}