Aleksandr Levchuk

def first_letters_freq(last_names)  letters = Hash.new(0)  last_names.sort.each do |name|    letters[name[0].chr] += 1  end  return lettersend@last_names = ['Amberg', 'Levchuk', 'Azazel', 'Arbuzov', 'Letov']require 'erb'template = ERB.new <<-EOF  <div>  <%     frequencies = first_letters_freq(@last_names)  %>  </div>EOF