require 'generator'
enumerator = SyncEnumerator.new(%w{Four seven}, %w{score years},
%w{and ago})
enumerator.each do |row|
row.each { |word| puts word }
puts '---'
end
enumerator = SyncEnumerator.new(%w{Four and}, %w{score seven years ago})
enumerator.each do |row|
row.each { |word| puts word }
puts '---'
end