#include<iostream> #include<cstring> using namespace std; int main() { char a[7891]; cin>>a; int len=strlen(a); for(int i=0,j=len-1;i<len,j>=0;i++,j--) { if(a[i]==a[j]) { continue; } else { cout<<"No"; return 0; } } cout<<"Yes"; return 0; }