#include <stdio.h>
#include <string.h>
#define MAXSIZE 105
int main()
{
char Berlandish[MAXSIZE];
char Birlandish[MAXSIZE];
scanf("%s", Berlandish);
scanf("%s", Birlandish);
int length=strlen(Berlandish);
int i, j;
for(i=0, j=(length-1); i<length; ++i,--j)
{
if(Berlandish[i]==Birlandish[j])
;
else
break;
}
//printf("%d\n", i);
if(i==length)
printf("YES\n");
else
printf("NO\n");
return 0;
}