#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, m, mx, mn, k, l = 0, r = 0, i;
  cin >> n >> m >> mn >> mx;
  for (i = 1; i <= m; i++) {
    cin >> k;
    if (mn > k || k > mx) {
      cout << "Incorrect";
      return 0;
    }
    if (k == mn) l = 1;
    if (k == mx) r = 1;
  }
  if (n - 2 >= m - l - r) {
    cout << "Correct";
    return 0;
  }
  cout << "Incorrect";
}
