#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 c=0;c<b/2;c++){ if(a[c]!=a[b-1-c]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }