A B C D E F G H I J K L M N O
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[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> H7	[ 4]○ ==> I8	[ 5]● ==> I6
[ 6]○ ==> I9	[ 7]● ==> G9	[ 8]○ ==> J7	[ 9]● ==> G10	[10]○ ==> G8
[11]● ==> I10	[12]○ ==> J6	[13]● ==> J8	[14]○ ==> K9	[15]● ==> K6
[16]○ ==> L8	[17]● ==> J10	[18]○ ==> H10	[19]● ==> J9	[20]○ ==> H11
[21]● ==> H12	[22]○ ==> G13	[23]● ==> I5	[24]○ ==> I4	[25]● ==> J4
[26]○ ==> H6	[27]● ==> K3	[28]○ ==> K4	[29]● ==> L2	[30]○ ==> M1
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 15 ┌┬┬┬┬┬┬┬┬┬┬┬┬┬┐ 
 14 ├┼┼┼┼┼┼┼┼┼┼┼┼┼┤ 
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  1 └┴┴┴┴┴┴┴┴┴┴┴○┴┘ 

[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> H7	[ 4]○ ==> I8	[ 5]● ==> I6
[ 6]○ ==> I9	[ 7]● ==> G9	[ 8]○ ==> J7	[ 9]● ==> G10	[10]○ ==> G8
[11]● ==> I10	[12]○ ==> J6	[13]● ==> J8	[14]○ ==> K9	[15]● ==> K6
[16]○ ==> L8	[17]● ==> J10	[18]○ ==> H10	[19]● ==> J9	[20]○ ==> H11
[21]● ==> H12	[22]○ ==> G13	[23]● ==> I5	[24]○ ==> I4	[25]● ==> J4
[26]○ ==> H6	[27]● ==> K3	[28]○ ==> K4	[29]● ==> L2	[30]○ ==> M1