#include <bits/stdc++.h>
using namespace std;
int main() {
  int maxt, mint, n, a, m, flag = 2, i;
  cin >> n >> m >> mint >> maxt;
  for (i = 1; i <= m; i++) {
    scanf("%d", &a);
    if (a == maxt)
      flag--;
    else if (a == mint)
      flag--;
    if (a > maxt || a < mint) flag = 100000000;
  }
  if (flag <= n - m)
    printf("Correct\n");
  else
    printf("Incorrect\n");
  return 0;
}
