#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 100 + 10;
int t[MAX_N];
int main() {
  int n, m, mini, maxi, x = MAX_N, y = 0;
  cin >> n >> m >> mini >> maxi;
  for (int i = 0; i < m; i++) {
    cin >> t[i];
    x = min(x, t[i]);
    y = max(y, t[i]);
  }
  int need = 2;
  if (x == mini) need--;
  if (y == maxi) need--;
  if (n - m < need || x < mini || y > maxi) {
    cout << "Incorrect\n";
    return 0;
  }
  cout << "Correct\n";
  return 0;
}
