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i = 0;
['a','b','c','d','e','f'].permutation(6).each do |s|
	i = i + 1;
	if(i==428) then
		p s.join
	end
end

Success #stdin #stdout 0.01s 8092KB

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Standard input is empty

stdout

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"dcfaeb"

https://ideone.com/vSrXUc

language:

Ruby (ruby 2.5.5)

created:

visibility:

public

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