#include <bits/stdc++.h>
using namespace std;
int a[105];
int main() {
  int n, m, min, max, flag = 0;
  cin >> n >> m >> min >> max;
  int t = m + 2;
  for (int i = 0; i < m; i++) {
    cin >> a[i];
    if (a[i] < min || a[i] > max)
      flag = 1;
    else if (a[i] == min)
      t--;
    else if (a[i] == max)
      t--;
  }
  if (flag || t > n)
    cout << "Incorrect" << endl;
  else
    cout << "Correct" << endl;
  return 0;
}
