A B C D E F G H I J K L M N O
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  1 └┴┴┴┴┴┴┴┴┴┴┴┴┴┘ 

[ 1]● ==> H8   [ 2]○ ==> I9   [ 3]● ==> I6   [ 4]○ ==> G9   [ 5]● ==> J8
[ 6]○ ==> G8   [ 7]● ==> J9   [ 8]○ ==> G10  [ 9]● ==> G11  [10]○ ==> J10
[11]● ==> K8   [12]○ ==> J7   [13]● ==> I8   [14]○ ==> L8   [15]● ==> G6
[16]○ ==> H7   [17]● ==> K6   [18]○ ==> I10  [19]● ==> K10  [20]○ ==> K9
[21]● ==> I11  [22]○ ==> F9   [23]● ==> H9   [24]○ ==> H11  [25]● ==> E8
[26]○ ==> E10  [27]● ==> D11  [28]○ ==> F10  [29]● ==> H10  [30]○ ==> F11 
[31]● ==> F12  [32]○ ==> D9   [33]● ==> C8   [34]○ ==> F8