#include <bits/stdc++.h>
using namespace std;
long long INF = (1LL << 62);
int saw[1005];
int main() {
  ios_base::sync_with_stdio(false);
  int n, m, mi, ma;
  cin >> n >> m >> mi >> ma;
  vector<int> V;
  int sawmi = 0;
  int sawma = 0;
  for (int i = 0; i < m; ++i) {
    int x;
    cin >> x;
    if (x < mi || x > ma) {
      cout << "Incorrect" << endl;
      return 0;
    }
    if (x == mi) sawmi = 1;
    if (x == ma) sawma = 1;
    saw[x] = 1;
  }
  int left = n - m;
  if (sawmi == 0 && left > 0) saw[mi] = 1, left--;
  if (sawma == 0 && left > 0) saw[ma] = 1, left--;
  if (saw[mi] == 0 || saw[ma] == 0) {
    cout << "Incorrect" << endl;
    return 0;
  }
  cout << "Correct" << endl;
  return 0;
}
