#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  int n, m, mmin, mmax;
  scanf("%d %d %d %d\n", &n, &m, &mmin, &mmax);
  int e_min = false;
  int e_max = false;
  bool flag = true;
  for (int i = 0; i < m; i++) {
    int x;
    scanf("%d", &x);
    if (x < mmin || x > mmax) flag = false;
    e_min = x == mmin || e_min;
    e_max = x == mmax || e_max;
  }
  if (flag) {
    if (e_min || e_max) {
      cout << "Correct" << endl;
    } else {
      if (m + 2 <= n) {
        cout << "Correct" << endl;
      } else {
        cout << "Incorrect" << endl;
      }
    }
  } else {
    cout << "Incorrect" << endl;
  }
  return 0;
}
