>>44
    ●●●●●●●●●●●●●
  ●●                        ●
  ●●                        ●
  ●●                        ●
  蟹●●                      ●●  k
    ●●●                        ●
●●●                        ●●
  ●●  角                    ●
  ●●                        ●
  ●●                        ●
    ●●●●●●●●●●●●●