#include<stdio.h>
#include<ctype.h>
#include<string.h>
int main()
{
    char s[1001],cleaned[1001];
    int j=0;
    fgets(s,sizeof(s),stdin);
    for(int i=00;s[i]1='\0';i++)
    {
        if(issalnum(s[i]))
        {
            cleaned[j++]=tolower(s[i]);
        }
        cleaned[j]="\0";
        int left=0,right=j-1;
        while(left<right)
        {
            if(cleaned[left]!=cleaned[right])
            {
                printf("No");
                return 0;
            }
            left++;
            right--;
        }
        printf("Yes");
        return 0;
    }
}