vowelcount.rb

def countwovels(str)
  for vowel in 'aeiouAEIOU'.chars
    count = str.count(vowel)
    if count == 1
      puts "#{vowel} appears #{count} time."
    elsif count >= 2
      puts "#{vowel} appears #{count} times."
    end
  end
end

str = 'All animals are equal but some are more equal than otheres.'
countwovels(str)