(10, 14)
          ( 2 )

(15, 24)
          (    )

(21, 35)
          (    )

(8, 20)
          (    )

(6, 4)
          (    )

(55, 33)
          (    )

(10, 35)
          (    )

(72, 9)
          (    )

(4, 28)
          (    )

        +[    ]

(32, 4)
          (    )

(21, 6)
          (    )

(40, 10)
          (    )

(28, 36)
          (    )

(20, 25)
          (    )

(48, 8)
          (    )

(4, 14)
          (    )

(64, 56)
          (    )

(77, 33)
          (    )

        +[    ]

(24, 28)
          (    )

(10, 40)
          (    )

(3, 15)
          (    )

(9, 45)
          (    )

(55, 66)
          (    )

(30, 25)
          (    )

(8, 6)
          (    )

(20, 50)
          (    )

(8, 24)
          (    )

        +[    ]

(90, 70)
          (    )

(10, 4)
          (    )

(18, 30)
          (    )

(22, 77)
          (    )

(16, 28)
          (    )

(8, 32)
          (    )

(35, 42)
          (    )

(32, 12)
          (    )

(42, 18)
          (    )

        +[    ]

(24, 8)
          (    )

(16, 8)
          (    )

(9, 27)
          (    )

(16, 72)
          (    )

(72, 9)
          (    )

(18, 24)
          (    )

(24, 6)
          (    )

(16, 18)
          (    )

(12, 2)
          (    )

        +[    ]

  ++[[       ]]

(10, 14)
          ( 2 )
(15, 24)
          ( 3 )
(21, 35)
          ( 7 )
(8, 20)
          ( 4 )
(6, 4)
          ( 2 )
(55, 33)
          ( 11 )
(10, 35)
          ( 5 )
(72, 9)
          ( 9 )
(4, 28)
          ( 4 )
        +[    ]

(32, 4)
          ( 4 )
(21, 6)
          ( 3 )
(40, 10)
          ( 10 )
(28, 36)
          ( 4 )
(20, 25)
          ( 5 )
(48, 8)
          ( 8 )
(4, 14)
          ( 2 )
(64, 56)
          ( 8 )
(77, 33)
          ( 11 )
        +[    ]

(24, 28)
          ( 4 )
(10, 40)
          ( 10 )
(3, 15)
          ( 3 )
(9, 45)
          ( 9 )
(55, 66)
          ( 11 )
(30, 25)
          ( 5 )
(8, 6)
          ( 2 )
(20, 50)
          ( 10 )
(8, 24)
          ( 8 )
        +[    ]

(90, 70)
          ( 10 )
(10, 4)
          ( 2 )
(18, 30)
          ( 6 )
(22, 77)
          ( 11 )
(16, 28)
          ( 4 )
(8, 32)
          ( 8 )
(35, 42)
          ( 7 )
(32, 12)
          ( 4 )
(42, 18)
          ( 6 )
        +[    ]

(24, 8)
          ( 8 )
(16, 8)
          ( 8 )
(9, 27)
          ( 9 )
(16, 72)
          ( 8 )
(72, 9)
          ( 9 )
(18, 24)
          ( 6 )
(24, 6)
          ( 6 )
(16, 18)
          ( 2 )
(12, 2)
          ( 2 )
        +[    ]

  ++[[       ]]