10 lines
255 B
Text
10 lines
255 B
Text
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for len in (1..8) {
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var (pre="", post="")
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@^len -> permutations {|*p|
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var t = p.join
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post.append!(t) if !post.contains(t)
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pre.prepend!(t) if !pre.contains(t)
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}
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printf("%2d: %8d %8d\n", len, pre.len, post.len)
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}
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