#include<stdio.h>
int main()
{
    int m,n,t,a,b,c,d;
    scanf("%d",&m);
    n=m/100000;
    t=m%10;
    a=m/10000%10;
    b=m/10%10;
    c=m/1000%10;
    d=m/100%10;
    if(n==t&&a==b&&c==d)
        printf("Y");
    else
        printf("N");
    return 0;
}
/**************************************************************
	Problem: 1629
	User: admin
	Language: C
	Result: Accepted
	Time:15 ms
	Memory:1144 kb
****************************************************************/