#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main(){
  int n;
  cin >> n;

  string s;
  cin >> s;

  string two = s;
  for(int i = 0; i < n; i++) {
    if(two[i] == '?') {
      two[i] = '2';
    }
  }
  int cnt = 0;
  for(int i = 0; i < n; i++) {
    if(two[i] == '2') {
      cnt++;
    }
    else {
      cnt = 0;
    }
    if(cnt >= 2) {
      cout << "cool" << endl;
      return 0;
    }
  }

  string three = s;
  cnt = 0;
  for(int i =0 ; i < n; i++) {
    if(three[i] == '?') {
      three[i] = '3';
    }
  }
  for(int i = 0; i < n; i++) {
    if(three[i] == '3') {
      cnt++;
    }
    else {
      cnt = 0;
    }
    if(cnt >= 3) {
      cout << "cool" << endl;
      return 0;
    }
  }
  string fives = s;
  for(int i = 0; i < n; i++) {
    if(fives[i] == '?') {
      fives[i] = '5';
    }
  }
  cnt = 0;
  for(int i = 0; i < n; i++) {
    if(fives[i] == '5'){
      cnt++;
    }
    else {
      cnt = 0;
    }
    if(cnt >= 5) {
      cout << "cool" << endl;
      return 0;
    }
  }
  string sevens = s;
  for(int i = 0; i < n; i++) {
    if(sevens[i] == '?') {
      sevens[i] = '7';
    }
  }
  cnt = 0;

  for(int i = 0; i < n; i++) {
    if(sevens[i] == '7') {
      cnt++;
    }
    else {
      cnt = 0;
    }
    if(cnt >= 7) {
      cout << "cool" << endl;
      return 0;
    }
  }
  cout << "boring" << endl;
 return 0;
}