Markus and Rich (All tests passing)

gistfile1.txt

class WellFormed
  attr_reader :input, :collector
 
  BRACES = { ']' => '[', ')' => '(', '}' => '{' }
 
  def initialize(input)
    @input = input
    @collector = []
  end
 
  def valid?
    input.chars.each do |char|
      if BRACES.values.include?(char)
        @collector << char
      elsif BRACES.keys.include?(char)
        if @collector.last == BRACES[char]
          @collector.pop
        else
          return false
        end
      end
    end
    return true
  end
 
end