#include<bits/stdc++.h> using namespace std; int main() { string s1; cin>>s1; int n=0; while(s1[n]!='\0'){ n++; } for(int i=0;i<n/2;i++){ if(s1[i]!=s1[n-i-1]){ cout<<"No"; return 0; } } cout<<"Yes"; return 0; }