#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, max1, min1, a[100];
  scanf("%d", &n);
  scanf("%d", &m);
  scanf("%d", &min1);
  scanf("%d", &max1);
  int fmax = 0, fmin = 0, frange = 0;
  for (int i = 0; i < m; i++) scanf("%d", &a[i]);
  for (int i = 0; i < m; i++) {
    if ((a[i] < min1) || (a[i] > max1)) {
      frange = 1;
      break;
    }
    if (a[i] == max1) fmax = 1;
    if (a[i] == min1) fmin = 1;
  }
  if ((frange == 1) || (n < m) || ((n - m < 2) && (!fmax) && (!fmin)) ||
      ((n - m < 1) && ((!fmax) || ((!fmin)))))
    printf("Incorrect\n");
  else
    printf("Correct\n");
  return 0;
}
