#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, mmax, mmin, f1 = 0, f2 = 0, flag = 0;
  cin >> n >> m >> mmin >> mmax;
  for (int i = 0; i < m; i++) {
    int a;
    cin >> a;
    if (a > mmax || a < mmin) flag = 1;
    if (a == mmax) f1 = 1;
    if (a == mmin) f2 = 1;
  }
  if (n - m < 2 - f1 - f2 || flag)
    puts("Incorrect");
  else
    puts("Correct");
}
