(49, 42)
          ( 7 )

(63, 14)
          (    )

(4, 2)
          (    )

(56, 7)
          (    )

(28, 49)
          (    )

(18, 8)
          (    )

(56, 48)
          (    )

(42, 24)
          (    )

(81, 18)
          (    )

        +[    ]

(49, 7)
          (    )

(16, 4)
          (    )

(14, 35)
          (    )

(56, 49)
          (    )

(16, 20)
          (    )

(25, 30)
          (    )

(14, 7)
          (    )

(20, 35)
          (    )

(5, 40)
          (    )

        +[    ]

(18, 30)
          (    )

(14, 12)
          (    )

(49, 42)
          (    )

(18, 63)
          (    )

(45, 25)
          (    )

(6, 15)
          (    )

(4, 28)
          (    )

(18, 6)
          (    )

(63, 27)
          (    )

        +[    ]

(4, 14)
          (    )

(80, 90)
          (    )

(6, 27)
          (    )

(70, 50)
          (    )

(14, 16)
          (    )

(7, 14)
          (    )

(24, 28)
          (    )

(36, 6)
          (    )

(18, 45)
          (    )

        +[    ]

(24, 28)
          (    )

(54, 63)
          (    )

(70, 90)
          (    )

(12, 32)
          (    )

(56, 32)
          (    )

(22, 55)
          (    )

(42, 18)
          (    )

(20, 30)
          (    )

(6, 12)
          (    )

        +[    ]

  ++[[       ]]

(49, 42)
          ( 7 )
(63, 14)
          ( 7 )
(4, 2)
          ( 2 )
(56, 7)
          ( 7 )
(28, 49)
          ( 7 )
(18, 8)
          ( 2 )
(56, 48)
          ( 8 )
(42, 24)
          ( 6 )
(81, 18)
          ( 9 )
        +[    ]

(49, 7)
          ( 7 )
(16, 4)
          ( 4 )
(14, 35)
          ( 7 )
(56, 49)
          ( 7 )
(16, 20)
          ( 4 )
(25, 30)
          ( 5 )
(14, 7)
          ( 7 )
(20, 35)
          ( 5 )
(5, 40)
          ( 5 )
        +[    ]

(18, 30)
          ( 6 )
(14, 12)
          ( 2 )
(49, 42)
          ( 7 )
(18, 63)
          ( 9 )
(45, 25)
          ( 5 )
(6, 15)
          ( 3 )
(4, 28)
          ( 4 )
(18, 6)
          ( 6 )
(63, 27)
          ( 9 )
        +[    ]

(4, 14)
          ( 2 )
(80, 90)
          ( 10 )
(6, 27)
          ( 3 )
(70, 50)
          ( 10 )
(14, 16)
          ( 2 )
(7, 14)
          ( 7 )
(24, 28)
          ( 4 )
(36, 6)
          ( 6 )
(18, 45)
          ( 9 )
        +[    ]

(24, 28)
          ( 4 )
(54, 63)
          ( 9 )
(70, 90)
          ( 10 )
(12, 32)
          ( 4 )
(56, 32)
          ( 8 )
(22, 55)
          ( 11 )
(42, 18)
          ( 6 )
(20, 30)
          ( 10 )
(6, 12)
          ( 6 )
        +[    ]

  ++[[       ]]