a.cpp

#include <bits/stdc++.h>
using namespace std;

int main(int argc, char *argv[])
{
  string s;
  cin>>s;

  for(int i=0;i<=s.size()/2;i++)
    {
      if(s[i]!=s[s.size()-1-i]&&s[i]!='*'&&s[s.size()-1-i]!='*')
        {
          cout<<"NO"<<endl;
          return 0;
        }
    }
  cout<<"YES"<<endl;
  return 0;
}