A B C D E F G H I J K L M N O
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1 └┴┴┴┴┴┴┴┴┴┴┴┴┴┘
[ 1]● ==> H8 [ 2]○ ==> H9 [ 3]● ==> I10 [ 4]○ ==> I9 [ 5]● ==> G9
[ 6]○ ==> G8 [ 7]● ==> F10 [ 8]○ ==> E11 [ 9]● ==> H10 [10]○ ==> G10
[11]● ==> I11 [12]○ ==> J12 [13]● ==> H12 [14]○ ==> F11 [15]● ==> E12
[16]○ ==> D11 [17]● ==> G11 [18]○ ==> I13 [19]● ==> G12 [20]○ ==> F12
[21]● ==> H11 [22]○ ==> F13 [23]● ==> K9 [24]○ ==> J7 [25]● ==> I8
[26]○ ==> G13 [27]● ==> K11 [28]○ ==> J11 [29]● ==> K8 [30]○ ==> J9
[31]● ==> K10 [32]○ ==> J10 [33]● ==> K12