#include
#include
int main()
{
char a[100200],n;
while (gets(a))
{ n=strlen(a) ;
char *p,*q;
int t=0;
int k=1;
k=strcmp(a,"2013");
if(k==0)return 0;
for(p=a,q=a+n-1;p<q;p++,q--)
{while (*p==' ')p++;while (*q==' ')q--;
if(*p!=*q){t++;break;}
}
if(t)
printf("NO\n");
else printf("YES\n");}
return 0;
}