#include<stdio.h>
#include<string.h>
#include<ctype.h>

int main()
{
    char s[1001], c[1001];
    scanf("%s",s);
    int k = 0;
    for(int i = 0; s[i]; i++)
    { if(isalnum(s[i])) { c[k++] = tolower(s[i]); } }
    c[k]=' '
    int 1 = 0, r = k - 1, ip = 1;
    while(l < r)
    {
        if(c[l] != c[r])
        { ip = 0; break; }
    l++; r--;
    }
    printf("%s",ip ? "Yes":"No");
    return 0;
}