#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(){ char a[1000]={0}; int i,n=0,flag=1; cin>>a; while(a[n]!='\0') n++; for(i=0;i<=n/2;i++){ if(a[i]!=a[n-1-i]){ flag=0; break; } } if(flag) cout<<"Yes"<<endl; else cout<<"No"<<endl; return 0; }