Caveman

Since the Golgafrinchans have crashed on prehistoric earth the indigenous cavemen have started to die off. However Arthur finds the cavemen's company more appealing than that of the Golgafrinchans. Arthur tries to play Scrabble with a caveman. He complains that the caveman cannot spell "Grunt" and "Agh", and would probably spell "library with one R". However the caveman does spell out "forty-two".