#include <bits/stdc++.h>
using namespace std;
long long int ans[100000];
int main() {
  long long int n, m, mx, mn, i, j, k, diff, flag = 0, flag1 = 0, flag2 = 0;
  cin >> n >> m >> mn >> mx;
  long long int arr[m + 5];
  for (i = 0; i < m; i++) {
    cin >> arr[i];
    if (arr[i] == mn) flag1 = 1;
    if (arr[i] == mx) flag2 = 1;
    if (arr[i] < mn || arr[i] > mx) flag = 1;
  }
  diff = n - m;
  if (flag == 1)
    cout << "Incorrect" << endl;
  else if (flag1 == 1 && flag2 == 1)
    cout << "Correct" << endl;
  else if (flag1 == 1 && diff >= 1 || flag2 == 1 && diff >= 1)
    cout << "Correct" << endl;
  else if (flag1 == 0 && flag2 == 0 && diff >= 2)
    cout << "Correct" << endl;
  else
    cout << "Incorrect" << endl;
  return 0;
}
