static void Main(string[] args)
{
string input1 = Console.ReadLine().ToLower();
string input2 = Console.ReadLine().ToLower();
bool correct = true;
if (input1.Length != input2.Length)
Console.WriteLine("NO");
else
{
int last = input2.Length - 1;
for (int i = 0; i < input1.Length; i++)
{
if (input1[i] == 's')
{
if (input2[last] == 't')
{
last--;
continue;
}
}
else
{
if (input1[i] != input2[last])
{
correct = false;
Console.WriteLine("NO");
break;
}
}
last--;
}
}
if(correct)
Console.WriteLine("YES");
Console.ReadLine();
}