#include <bits/stdc++.h>
using namespace std;
int main() {
  int m, n, mi, ma;
  cin >> m >> n >> mi >> ma;
  std::vector<int> v(n);
  map<int, bool> mp;
  for (int i = 0; i < n; i++) {
    cin >> v[i];
    mp[v[i]] = true;
    if (v[i] > ma) {
      cout << "Incorrect\n";
      return 0;
    }
    if (v[i] < mi) {
      cout << "Incorrect\n";
      return 0;
    }
  }
  int cnt = !mp[mi] + !mp[ma];
  if (m - n < cnt)
    cout << "Incorrect\n";
  else
    cout << "Correct\n";
}
