#include <bits/stdc++.h>
using namespace std;
int main() {
  bool flag = false;
  int n, m, dato, minimo, maximo, minTmp, maxTmp, vacio;
  cin >> n >> m >> minimo >> maximo;
  vacio = n - m;
  minTmp = (1 << 30);
  maxTmp = -1;
  for (int i = 0; i < m; i++) {
    cin >> dato;
    minTmp = min(minTmp, dato);
    maxTmp = max(maxTmp, dato);
  }
  if (minTmp > minimo && maxTmp < maximo && vacio >= 2) {
    cout << "Correct" << endl;
    return 0;
  }
  if (minimo == minTmp && maximo == maxTmp) {
    flag = true;
  } else {
    if (minimo == minTmp) {
      if (maxTmp > maximo)
        flag = false;
      else if (vacio >= 1)
        flag = true;
    } else {
      if (maximo == maxTmp) {
        if (minTmp < minimo)
          flag = false;
        else if (vacio >= 1)
          flag = true;
      } else
        flag = false;
    }
  }
  if (flag)
    cout << "Correct" << endl;
  else
    cout << "Incorrect" << endl;
  return 0;
}
