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lines = gets.chomp.split.reverse
puts lines.map(&:length).max.times.map { |i| lines.map { |s| s[i] ? s[i] : '　' }*'' }

Success #stdin #stdout 0.01s 6108KB

stdin

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謹賀新年 謹んで初春の お慶びを 申し上げます

stdout

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申お謹謹
し慶ん賀
上びで新
げを初年
ま　春　
す　の

https://ideone.com/fRHA7Q

language:

Ruby (ruby 2.5.5)

created:

visibility:

secret

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