7 lines
239 B
Text
7 lines
239 B
Text
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filter=: {: ,~ ({~ i.@>.&.(%&20)@#) NB. take every 20th and last item
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filter evolve 'METHINKS IT IS LIKE A WEASEL'
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XXURVQXKQXDLCGFVICCUA NUQPND
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MEFHINVQQXT IW LIKEUA WEAPEL
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METHINVS IT IW LIKEUA WEAPEL
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METHINKS IT IS LIKE A WEASEL
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