A B C D E F G H I J K L M N O
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[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> J9	[ 4]○ ==> I10	[ 5]● ==> G8
[ 6]○ ==> I8	[ 7]● ==> J7	[ 8]○ ==> J10	[ 9]● ==> I11	[10]○ ==> K10
[11]● ==> H10	[12]○ ==> K11	[13]● ==> L10	[14]○ ==> L12	[15]● ==> M13
[16]○ ==> K12	[17]● ==> K13	[18]○ ==> J12	[19]● ==> I12	[20]○ ==> L13
[21]● ==> J11	[22]○ ==> L11	[23]● ==> M10	[24]○ ==> K8	[25]● ==> K9
[26]○ ==> L15	[27]● ==> L14	[28]○ ==> M12	[29]● ==> N12	[30]○ ==> M11
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  1 └┴┴┴┴┴┴┴┴┴┴┴┴┴┘ 

[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> J9	[ 4]○ ==> I10	[ 5]● ==> G8
[ 6]○ ==> I8	[ 7]● ==> J7	[ 8]○ ==> J10	[ 9]● ==> I11	[10]○ ==> K10
[11]● ==> H10	[12]○ ==> K11	[13]● ==> L10	[14]○ ==> L12	[15]● ==> M13
[16]○ ==> K12	[17]● ==> K13	[18]○ ==> J12	[19]● ==> I12	[20]○ ==> L13
[21]● ==> J11	[22]○ ==> L11	[23]● ==> M10	[24]○ ==> K8	[25]● ==> K9
[26]○ ==> L15	[27]● ==> L14	[28]○ ==> M12	[29]● ==> N12	[30]○ ==> M11