#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m, mn, mx;
  cin >> n >> m >> mn >> mx;
  int mn1 = INT_MAX, mx1 = -INT_MAX;
  for (int i = 0; i < m; i++) {
    int a;
    cin >> a;
    mn1 = min(mn1, a);
    mx1 = max(mx1, a);
  }
  if ((mn1 == mn && mx1 == mx && abs(m - n) == 0) ||
      (abs(n - m) > 1 && (mn1 >= mn && mx1 <= mx)) ||
      (((mn1 >= mn && mx1 == mx) || (mn1 == mn && mx1 <= mx)) &&
       abs(n - m) >= 1))
    puts("Correct");
  else
    puts("Incorrect");
  return 0;
}
