#include <bits/stdc++.h>
int main() {
  int i, j, k;
  int t, n, m;
  int a, b, tt;
  while (scanf("%d%d%d%d", &n, &m, &a, &b) != EOF) {
    j = 0;
    k = 0;
    tt = 0;
    for (i = 0; i < m; i++) {
      scanf("%d", &t);
      if (t < a || t > b) {
        tt = 1;
      } else if (t == a)
        j = 1;
      else if (t == b)
        k = 1;
    }
    if (n - m + j + k >= 2 && tt == 0)
      printf("Correct\n");
    else
      printf("Incorrect\n");
  }
  return 0;
}
