class Die
  def initialize(sides)
    if sides.length < 1
     raise ArgumentError.new("Wrong number of sides")
    else
      @sides = sides
    end
  end

  def sides
    numSides = @sides.count
    @numSides = numSides
  end

  def roll
    self.sample
  end
end

die = Die.new(['w','e','a','q','t','v','c'])

die.roll