#include <bits/stdc++.h>
using namespace std;
int main() {
  string me;
  cin >> me;
  if (me.size() < 10) {
    cout << "NO" << endl;
    return 0;
  }
  if (me.substr(0, 10) == "CODEFORCES") {
    cout << "YES" << endl;
    return 0;
  }
  if (me.substr(me.size() - 10, 10) == "CODEFORCES") {
    cout << "YES" << endl;
    return 0;
  }
  if (me[0] == 'C') {
    if (me.substr(0, 9) == "CODEFORCE" && me.substr(me.size() - 1, 1) == "S") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 8) == "CODEFORC" && me.substr(me.size() - 2, 2) == "ES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 7) == "CODEFOR" && me.substr(me.size() - 3, 3) == "CES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 6) == "CODEFO" && me.substr(me.size() - 4, 4) == "RCES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 5) == "CODEF" && me.substr(me.size() - 5, 5) == "ORCES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 4) == "CODE" && me.substr(me.size() - 6, 6) == "FORCES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 3) == "COD" && me.substr(me.size() - 7, 7) == "EFORCES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 2) == "CO" && me.substr(me.size() - 8, 8) == "DEFORCES") {
      cout << "YES" << endl;
      return 0;
    }
    if (me.substr(0, 1) == "C" && me.substr(me.size() - 9, 9) == "ODEFORCES") {
      cout << "YES" << endl;
      return 0;
    }
  }
  cout << "NO" << endl;
  return 0;
}
