( 4 ) + 7 + 1 = 12
          
7 + (    ) - 1 = 9
          
(    ) + 2 + 1 = 6
          
(    ) + 8 + 2 = 13
          
(    ) + 8 - 3 = 11
          
(    ) + 2 - 1 = 9
          
3 + (    ) - 1 = 6
          
5 + (    ) + 1 = 11
          
3 + (    ) + 1 = 7
          
(    ) + 9 + 4 = 18
          
2 + (    ) - 1 = 3
          
2 + (    ) - 2 = 6
          
(    ) + 8 + 2 = 14
          
6 + (    ) + 2 = 15
          
          +[    ]

(    ) + 5 - 4 = 8
          
(    ) + 3 + 1 = 11
          
(    ) + 3 + 1 = 6
          
6 + (    ) + 2 = 11
          
7 + (    ) + 4 = 19
          
6 + (    ) - 3 = 7
          
4 + (    ) - 2 = 5
          
9 + (    ) - 1 = 10
          
(    ) + 4 + 1 = 14
          
9 + (    ) - 1 = 10
          
(    ) + 3 - 7 = 4
          
(    ) + 2 - 2 = 3
          
(    ) + 7 - 3 = 10
          
(    ) + 2 - 1 = 4
          
          +[    ]

9 + (    ) - 4 = 13
          
(    ) + 7 - 1 = 10
          
4 + (    ) - 5 = 7
          
6 + (    ) + 5 = 19
          
6 + (    ) + 1 = 9
          
(    ) + 2 + 6 = 17
          
5 + (    ) + 5 = 19
          
9 + (    ) + 5 = 20
          
(    ) + 5 + 4 = 16
          
(    ) + 9 + 3 = 19
          
(    ) + 2 - 1 = 3
          
(    ) + 6 - 4 = 9
          
2 + (    ) - 7 = 3
          
6 + (    ) - 6 = 8
          
          +[    ]

  ++[[       ]]