めぐるセル

#!/usr/bin/env ruby
#http://qiita.com/Nabetani/items/636fce060e1ebbc95f9b
#http://nabetani.sakura.ne.jp/hena/ord25rotcell/
if RUBY_VERSION<'1.9'
    require 'rubygems'
    require 'backports' # (Math.cbrtと異なり)1.8のArray#rotateはbackportsに存在するので、ありがたく使わせて頂きます
end
if $0==__FILE__
    STDOUT.sync=true
    while gets
        str=''
        area=[*'a'..'y'].each_slice(5).to_a
        $_.chomp.split(',').each{|s|
            x,y=2.times.map{|i|[*0...area[0].size].product([*0...area.size]).find{|x,y|area[y][x]==s[i,1]}}.transpose
            minx,maxx=x.minmax.zip([-1,1]).map{|e|e.reduce(:+)}
            miny,maxy=y.minmax.zip([-1,1]).map{|e|e.reduce(:+)}
            x=minx
            y=miny
            rotaters=[]
            rotaters<<[x+=1,y] while x<maxx
            rotaters<<[x,y+=1] while y<maxy
            rotaters<<[x-=1,y] while x>minx
            rotaters<<[x,y-=1] while y>miny
            rotaters=rotaters.select{|x,y|0<=y&&y<area.size && 0<=x&&x<area[y].size}
            str=rotaters.map{|x,y|area[y][x]}.rotate(-1)
            rotaters.each_with_index{|(x,y),i|area[y][x]=str[i]}
        }
        puts str.empty? ? :none : str.sort*''
    end
end