class Main
  Brother = Struct.new(:i, :h, :w)

  def start
    brothers = input_term
    brothers = sort_term(brothers)
    echo brothers.map { |x| x.i }.join("\n")

    self.class.send(:remove_const, :Brother)
    return nil
  end

  private

  def sort_term(brothers)
    brothers.sort_by! { |x| x.w }.reverse!
    i = 0
    brothers.sort_by! { |x| [-x.h, i += 1] }.reverse!
    brothers
  end

  def input_term
    a = []
    for i in 0...3
      h, w = input.split
      brother = Brother.new(("A".ord + i).chr, h, w)
      a += [brother]
    end
    return a
  end

  def echo(*x)
    print(*x)
    puts
  end

  def input = gets.chomp
end

Main.new.start