#include <iostream>
#include <string>
#include <sstream>
#include <algorithm>

using std::string;
using std::cout;
using std::cin;
using std::endl;
using std::istringstream;

int main() {
  string nums = "8060";
  string input;
  cin >> input;

  if( input.substr(0,4) != "SKY-") {
    return 1;
  }

  bool b;
  transform(input.begin()+4, input.end()-5, input.begin()+4, ::tolower);

  if( istringstream(input.substr(4,4)) >> std::boolalpha >> b && b ) {
    for( int i = 9; i < input.size(); i++ ) {
      if( ((int)input[i] - 48 << 6) % 10 != (int)nums[i-9] - 48 ) {
        return 1;
      }
    }
    cout << "Correct!" << endl;
  }

  return 0;
}