=Θ = ←潴兜兜
                     AAA
                    AAAAA
                   AAAAAAA
                  AAAAAAAAA
                 AAAAAAAAAAA
                AAAAAAAAAAAAA
               AAAAAAAAAAAAAAA
              AAAAAAAAAAAAAAAAA
             AAAAAAAAAAAAAAAAAAA
            AAAAAAAAAAAAAAAAAAAAA
           AAAAAAAAAAAAAAAAAAAAAAA    AAAAAAAAA
          AAAAAAAAAAAAAAAAAAAAAAAAA  AAAAAAAAAAA
         AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
        AAAAAAAAAAAAAAAAAAAAAAAAAAAAA
       AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
      AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
     AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA