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[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> I8	[ 4]○ ==> G8	[ 5]● ==> I10
[ 6]○ ==> I7	[ 7]● ==> J9	[ 8]○ ==> H7	[ 9]● ==> K8	[10]○ ==> L7
[11]● ==> J8	[12]○ ==> L8	[13]● ==> J7	[14]○ ==> J10	[15]● ==> L9
[16]○ ==> I6	[17]● ==> J5	[18]○ ==> J6	[19]● ==> K9	[20]○ ==> M9
[21]● ==> K7	[22]○ ==> K6	[23]● ==> L6	[24]○ ==> I9	[25]● ==> K10
[26]○ ==> K11	[27]● ==> I12	[28]○ ==> G6	[29]● ==> H6	[30]○ ==> F9
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 15 ┌┬┬┬┬┬┬┬┬┬┬┬┬┬┐ 
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  1 └┴┴┴┴┴┴┴┴┴┴┴┴┴┘ 

[ 1]● ==> H8	[ 2]○ ==> H9	[ 3]● ==> I8	[ 4]○ ==> G8	[ 5]● ==> I10
[ 6]○ ==> I7	[ 7]● ==> J9	[ 8]○ ==> H7	[ 9]● ==> K8	[10]○ ==> L7
[11]● ==> J8	[12]○ ==> L8	[13]● ==> J7	[14]○ ==> J10	[15]● ==> L9
[16]○ ==> I6	[17]● ==> J5	[18]○ ==> J6	[19]● ==> K9	[20]○ ==> M9
[21]● ==> K7	[22]○ ==> K6	[23]● ==> L6	[24]○ ==> I9	[25]● ==> K10
[26]○ ==> K11	[27]● ==> I12	[28]○ ==> G6	[29]● ==> H6	[30]○ ==> F9