#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int n, m, ma, mi;
  cin >> n >> m >> mi >> ma;
  int a[m + 1];
  for (int i = 0; i < m; i++) cin >> a[i];
  bool f1 = false, f2 = false;
  for (int i = 0; i < m; i++) {
    if (a[i] < mi || a[i] > ma) {
      cout << "Incorrect" << endl;
      return 0;
    }
    if (a[i] == mi) f1 = true;
    if (a[i] == ma) f2 = true;
  }
  if (n - m == 1 && !f1 && !f2) {
    cout << "Incorrect" << endl;
    return 0;
  }
  if (n - m == 0 && (!f1 || !f2)) {
    cout << "Incorrect" << endl;
    return 0;
  }
  cout << "Correct" << endl;
  return 0;
}
