#include <bits/stdc++.h>
using namespace std;
int pd, s1, s2, n, m, a, b, x;
int main() {
  cin >> n >> m >> a >> b;
  pd = 1;
  s1 = s2 = 1;
  for (int i = 1; i <= m; i++) {
    cin >> x;
    if (x < a || x > b) pd = 0;
    if (x == a) s1 = 0;
    if (x == b) s2 = 0;
  }
  if (!pd || s1 + s2 > n - m)
    printf("Incorrect\n");
  else
    printf("Correct\n");
  return 0;
}
