#include <bits/stdc++.h>
using namespace std;
string s;
int n, m, mx, mn, a[100001], b[3];
int main() {
  cin >> n >> m >> mn >> mx;
  for (int i = 0; i < m; i++) cin >> a[i];
  bool f = false;
  int c = 0;
  for (int i = 0; i < m; i++) {
    if (a[i] == mn)
      b[0] = 1;
    else if (a[i] == mx)
      b[1] = 1;
    else if (a[i] > mx || a[i] < mn)
      b[2] = 1;
  }
  if (b[2] || (n - m == 1 && (!b[0] && !b[1])))
    cout << "Incorrect" << endl;
  else
    cout << "Correct" << endl;
  return 0;
}
