#include <bits/stdc++.h>
int main() {
  int count = 0, i, k, n, m, min, max, mindone = 0, maxdone = 0;
  scanf("%d %d %d %d", &n, &m, &min, &max);
  for (i = 0; i < m; i++) {
    scanf("%d", &k);
    if (k > max || k < min) {
      printf("Incorrect\n");
      return 0;
    }
    if (k == min && mindone == 0) {
      mindone = 1;
    } else if (k == max && maxdone == 0) {
      maxdone = 1;
    }
  }
  if (mindone == 0 && maxdone == 0) {
    count = 2;
  } else if (mindone == 0 || maxdone == 0) {
    count = 1;
  } else {
    count = 0;
  }
  if (count <= (n - m)) {
    printf("Correct\n");
  } else {
    printf("Incorrect\n");
  }
  return 0;
}
