#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, mi, ma;
  cin >> n >> m >> mi >> ma;
  int cmi = 1e9, cma = -1e9;
  for (int i = 0; i < m; i++) {
    int t;
    cin >> t;
    cmi = min(cmi, t);
    cma = max(cma, t);
  }
  if (m < n - 1) {
    if (cmi >= mi && cma <= ma) {
      cout << "Correct";
    } else {
      cout << "Incorrect";
    }
  } else {
    if ((cmi == mi && cma <= ma) || (cmi >= mi && cma == ma)) {
      cout << "Correct";
    } else {
      cout << "Incorrect";
    }
  }
  return 0;
}
