#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ string s,a,b; int n; cin>>s; n=s.length(); for(int i=0;i<n/2;i++){ if(s[i]!=s[n-1-i]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }