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RosettaCodeData/Task/Burrows-Wheeler-transform/J/burrows-wheeler-transform-2.j

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bwt=:verb def '{:"1 /:~(|."0 1~i.@#) (8 u:y),{:a.'
ibwt=: 1 (}.{:) (/:~@,.^:(#@]) 0#"0])
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