class Shape
    attr_reader :line_count

    def initialize(line_count)
        @line_count = line_count
    end
end

class Square < Shape
    attr_reader :side_length

    def initialize(side_length)
        super(4)
        @side_length = side_length
    end
end

square = Square.new(5)
# square.lineCount is 4

puts "line_count is #{square.line_count}"
puts "side_length is #{square.side_length}"