#include <bits/stdc++.h>
using namespace std;
const int MAXN = 100007;
int main() {
  int n, m, mmax, mmin;
  cin >> n >> m >> mmin >> mmax;
  int desire = 2;
  for (int i = 0; i < m; ++i) {
    int a;
    cin >> a;
    if (a == mmin) --desire;
    if (a == mmax) --desire;
    if (a < mmin || a > mmax) {
      cout << "Incorrect\n";
      return 0;
    }
  }
  if (n - m < desire)
    cout << "Incorrect\n";
  else
    cout << "Correct\n";
  return 0;
}
