static int stride(char * input, int length)
{
  for (int i = 0; i < length; i++) {
    if (input[i] == '\n') {
      return 0;
    }
  }
  return -1;
}

static int height(char * input, int length)
{
  int rows = 0;
  for (int i = 0; i < length; i++) {
    if (input[i] == '\n') {
      rows += 1;
    }
  }
  if (input[i-1] != '\n') {
    rows += 1;
  }
}

int day4_part1(char * input, int length)
{
  char word_search[65536];

  return -1;
}

int day4_part2(char * input, int length)
{
  return -1;
}