#!/usr/bin/ruby

#バイト列の頻度を求める

table = {}
while !ARGV.empty?
  fname = ARGV.shift
  begin
    open(fname, "r"){|io|
      $stderr.puts fname
      io.binmode
      c = io.read(1)
      while !io.eof?
        c2 = io.read(1)
        num = ("#{c}#{c2}".unpack("v").first >> 4)
        if table.include?(num) then
          table[num] += 1
        else
          table[num] = 1
        end
        c = c2
      end
    }
  rescue
  end
  
  sorted_table = table.to_a.sort{|a, b| a.last <=> b.last}
  sorted_table[0..10].each{|a, b|
    puts sprintf("| %03xx | #{b} |", a)
  }
  puts "======="
  sorted_table[-10..-1].each{|a, b|
    puts sprintf("| %03xx | #{b} |", a)
  }
end