#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long n, m, mini, maxi;
  cin >> n >> m >> mini >> maxi;
  long long arr[m + 1];
  for (long long i = 1; i <= m; i++) {
    cin >> arr[i];
  }
  sort(arr + 1, arr + m + 1);
  if (arr[1] < mini || arr[m] > maxi) {
    cout << "Incorrect\n";
    return 0;
  }
  if (arr[1] == mini && arr[m] == maxi) {
    cout << "Correct\n";
  } else if (arr[1] == mini || arr[m] == maxi) {
    cout << "Correct\n";
  } else {
    if (n - m == 1LL) {
      cout << "Incorrect\n";
    } else {
      cout << "Correct\n";
    }
  }
}
