#include <bits/stdc++.h>
using namespace std;
const int inf = 1 << 30;
int n, m, x, y;
int a, b;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cin >> n >> m >> x >> y;
  a = inf;
  b = -inf;
  for (int i = 1; i <= m; i++) {
    int val;
    cin >> val;
    a = min(a, val);
    b = max(b, val);
  }
  if (a < x || b > y) {
    cout << "Incorrect";
    return 0;
  }
  int cnt = 0;
  if (a > x) cnt++;
  if (y > b) cnt++;
  if (cnt <= n - m)
    cout << "Correct";
  else
    cout << "Incorrect";
  return 0;
}
