> >       ┏━┯━┯━┯━┯━┯━┯━┯━┓
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│○│●│　│　│○│○┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│○│●│○│●│●┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│●│○│●│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│○│●│○│　│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│●│●│○│　┃
> >       ┠─┼─┼─┼─┼─┼─┼─┼─┨
> >       ┃　│　│　│　│　│　│　│　┃
> >       ┗━┷━┷━┷━┷━┷━┷━┷━┛