#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ int j=0; char a[1000]; cin>>a; while(a[j]!='\0'){ j++; } for(int i=0;i<j/2;i++){ if(a[i]!=a[j-1-i]){ cout<<"No"; return 0;} } cout<<"Yes"; return 0; }