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