Ruby

6.rb

frequency_array = Array.new(8)
frequency_array.fill(Hash.new)

lines.each do |line|
  puts line.chars.join(' ')
  line.chars.each_with_index do |c,idx|
    hash = frequency_array[idx]
    if hash.include? c then
      hash[c] += 1
    else
      hash[c] = 1
    end
    puts "Added char #{c} to hash id #{idx} to make #{hash[c]} #{frequency_array}"
  end
end