+++ /dev/null
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-tt--------tttttttttttttttttttttt-ttt-t
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-tt-ttttttttt-tt-ttttt-t-t-ttt-tt-ttt-t
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-tttt-ttttttttttttttttttttt-ttttttttt-t
-tttt-ttt----------ttttt----ttttttttt-t
-tttt-----tttttttt-------tttttttttttt-t
-tttttttttttttttttttttttttttttttttttttt