#include <bits/stdc++.h>
using namespace std;
char a[51][51];
string s[51];
int n, m, t, test = 1;
int i, j, k;
int main() {
  int mi, ma;
  cin >> n >> m >> mi >> ma;
  int flag = 1;
  int mif = 0, maf = 0;
  int x;
  for (i = 0; i < m; i++) {
    cin >> x;
    if (x == mi) mif = 1;
    if (x == ma) maf = 1;
    if (flag == 1) {
      if (x < mi) flag = 0;
      if (x > ma) flag = 0;
    }
  }
  if (flag == 0) {
    cout << "Incorrect";
    cin >> x;
    return 0;
  }
  if (flag == 1) {
    if (mif == 1 && maf == 1) {
      cout << "Correct";
      cin >> x;
      return 0;
    }
    if (mif == 0 && maf == 0 && n - m >= 2) {
      cout << "Correct";
      cin >> x;
      return 0;
    }
    if ((mif == 0 && maf == 1 && n - m >= 1) ||
        (mif == 1 && maf == 0 && n - m >= 1)) {
      cout << "Correct";
      cin >> x;
      return 0;
    } else {
      cout << "Incorrect";
      cin >> x;
      return 0;
    }
  }
  cin >> x;
  { cout << "Incorrect"; }
  return 0;
}
