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