#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 a; cin>>a; int b=a.length(); for(int i=0;i<b/2;i++){ if(a[i]!=a[b-1-i]){ cout<<"No"<<endl; return 0; } } cout<<"Yes"<<endl; return 0; }