5 isnt s, nil, '.new for String'
6 is s.size, 4, '.size for String'
14 is ruby, 'ruby', '.each_char for String'
17 parrot.each('r') do |split|
19 is split, 'par', '.each(char) for String'
22 is split, 'r', '.each(char) for String'
25 is split, 'ot', '.each(char) for String'