(8, 20)
          ( 4 )

(20, 10)
          (    )

(11, 44)
          (    )

(20, 30)
          (    )

(7, 63)
          (    )

(49, 21)
          (    )

(16, 8)
          (    )

(24, 16)
          (    )

(30, 25)
          (    )

        +[    ]

(24, 21)
          (    )

(56, 64)
          (    )

(32, 56)
          (    )

(35, 25)
          (    )

(16, 12)
          (    )

(20, 15)
          (    )

(14, 16)
          (    )

(12, 16)
          (    )

(18, 48)
          (    )

        +[    ]

(8, 12)
          (    )

(16, 24)
          (    )

(70, 30)
          (    )

(18, 81)
          (    )

(48, 42)
          (    )

(6, 8)
          (    )

(42, 49)
          (    )

(20, 24)
          (    )

(56, 49)
          (    )

        +[    ]

(64, 8)
          (    )

(54, 24)
          (    )

(30, 80)
          (    )

(72, 81)
          (    )

(36, 4)
          (    )

(77, 44)
          (    )

(56, 40)
          (    )

(36, 9)
          (    )

(18, 6)
          (    )

        +[    ]

(35, 40)
          (    )

(21, 56)
          (    )

(45, 36)
          (    )

(10, 8)
          (    )

(16, 2)
          (    )

(8, 4)
          (    )

(72, 56)
          (    )

(3, 27)
          (    )

(35, 49)
          (    )

        +[    ]

  ++[[       ]]

(8, 20)
          ( 4 )
(20, 10)
          ( 10 )
(11, 44)
          ( 11 )
(20, 30)
          ( 10 )
(7, 63)
          ( 7 )
(49, 21)
          ( 7 )
(16, 8)
          ( 8 )
(24, 16)
          ( 8 )
(30, 25)
          ( 5 )
        +[    ]

(24, 21)
          ( 3 )
(56, 64)
          ( 8 )
(32, 56)
          ( 8 )
(35, 25)
          ( 5 )
(16, 12)
          ( 4 )
(20, 15)
          ( 5 )
(14, 16)
          ( 2 )
(12, 16)
          ( 4 )
(18, 48)
          ( 6 )
        +[    ]

(8, 12)
          ( 4 )
(16, 24)
          ( 8 )
(70, 30)
          ( 10 )
(18, 81)
          ( 9 )
(48, 42)
          ( 6 )
(6, 8)
          ( 2 )
(42, 49)
          ( 7 )
(20, 24)
          ( 4 )
(56, 49)
          ( 7 )
        +[    ]

(64, 8)
          ( 8 )
(54, 24)
          ( 6 )
(30, 80)
          ( 10 )
(72, 81)
          ( 9 )
(36, 4)
          ( 4 )
(77, 44)
          ( 11 )
(56, 40)
          ( 8 )
(36, 9)
          ( 9 )
(18, 6)
          ( 6 )
        +[    ]

(35, 40)
          ( 5 )
(21, 56)
          ( 7 )
(45, 36)
          ( 9 )
(10, 8)
          ( 2 )
(16, 2)
          ( 2 )
(8, 4)
          ( 4 )
(72, 56)
          ( 8 )
(3, 27)
          ( 3 )
(35, 49)
          ( 7 )
        +[    ]

  ++[[       ]]