(8, 10)
          ( 2 )

(27, 72)
          (    )

(24, 4)
          (    )

(20, 50)
          (    )

(15, 10)
          (    )

(45, 9)
          (    )

(9, 21)
          (    )

(5, 5)
          (    )

(40, 45)
          (    )

        +[    ]

(3, 3)
          (    )

(15, 20)
          (    )

(21, 27)
          (    )

(45, 27)
          (    )

(9, 24)
          (    )

(27, 24)
          (    )

(50, 60)
          (    )

(88, 11)
          (    )

(21, 3)
          (    )

        +[    ]

(48, 54)
          (    )

(18, 2)
          (    )

(4, 32)
          (    )

(36, 32)
          (    )

(45, 54)
          (    )

(64, 56)
          (    )

(16, 4)
          (    )

(18, 21)
          (    )

(24, 15)
          (    )

        +[    ]

(11, 66)
          (    )

(40, 72)
          (    )

(54, 6)
          (    )

(11, 66)
          (    )

(21, 24)
          (    )

(72, 63)
          (    )

(25, 40)
          (    )

(36, 27)
          (    )

(48, 42)
          (    )

        +[    ]

(24, 18)
          (    )

(12, 54)
          (    )

(9, 9)
          (    )

(81, 72)
          (    )

(11, 99)
          (    )

(33, 11)
          (    )

(42, 48)
          (    )

(32, 36)
          (    )

(12, 6)
          (    )

        +[    ]

  ++[[       ]]

(8, 10)
          ( 2 )
(27, 72)
          ( 9 )
(24, 4)
          ( 4 )
(20, 50)
          ( 10 )
(15, 10)
          ( 5 )
(45, 9)
          ( 9 )
(9, 21)
          ( 3 )
(5, 5)
          ( 5 )
(40, 45)
          ( 5 )
        +[    ]

(3, 3)
          ( 3 )
(15, 20)
          ( 5 )
(21, 27)
          ( 3 )
(45, 27)
          ( 9 )
(9, 24)
          ( 3 )
(27, 24)
          ( 3 )
(50, 60)
          ( 10 )
(88, 11)
          ( 11 )
(21, 3)
          ( 3 )
        +[    ]

(48, 54)
          ( 6 )
(18, 2)
          ( 2 )
(4, 32)
          ( 4 )
(36, 32)
          ( 4 )
(45, 54)
          ( 9 )
(64, 56)
          ( 8 )
(16, 4)
          ( 4 )
(18, 21)
          ( 3 )
(24, 15)
          ( 3 )
        +[    ]

(11, 66)
          ( 11 )
(40, 72)
          ( 8 )
(54, 6)
          ( 6 )
(11, 66)
          ( 11 )
(21, 24)
          ( 3 )
(72, 63)
          ( 9 )
(25, 40)
          ( 5 )
(36, 27)
          ( 9 )
(48, 42)
          ( 6 )
        +[    ]

(24, 18)
          ( 6 )
(12, 54)
          ( 6 )
(9, 9)
          ( 9 )
(81, 72)
          ( 9 )
(11, 99)
          ( 11 )
(33, 11)
          ( 11 )
(42, 48)
          ( 6 )
(32, 36)
          ( 4 )
(12, 6)
          ( 6 )
        +[    ]

  ++[[       ]]