@,@,,,@@,,                                          @@@@@,@@@@
@@@,,@,@,,                                          ,,,,@@,,,,
,,@,@@@@,,                                          ,,,@,@,,,@
,@@@,,,@,,                                          ,,@@@@,,@@
@,,@,,@@,,                                          ,@,,,@,@,@
@,@@,@,@,,                   body                   @@,,@@@@@,
@@,@@@@@,@ ,,,,,,,,,,,,,,,,,,=$$=,,,,,,,,,,,,,,,,,, ,@,@,,,,@@
,@@,,,,@@@                                          @@@@,,,@,,
@,@,,,@,,@            a body is a vessel            ,,,@,,@@,,
@@@,,@@,@,            a body is a vessel            ,,@@,@,@,@
,,@,@,@@@@            a body is a vessel            ,@,@@@@@@,
,@@@@@,,,@            a body is a vessel            @@@,,,,,@,
@,,,,@,,@,            a body is a vessel            ,,@,,,,@@,
@,,,@@,@@,            a body is a vessel            ,@@,,,@,@@
@,,@,@@,@@            a body is a vessel            @,@,,@@@,,
@,@@@,@@,@            a body is a vessel            @@@,@,,@,@
@@,,@@,@@,            a body is a vessel            ,,@@@,@@@,
,@,@,@@,@,                                          ,@,,@@,,@@
@@@@@,@@@@                                          @@,@,@,@,@
,,,,@@,,,,                                          ,@@@@@@@@,
,,,@,@,,,,                                          @,,,,,,,@,
,,@@@@,,,@                                          @,,,,,,@@,