The beads in the shorter grooves denote fives (five units, five tens, etc.) resembling a bi-quinary coded decimal system related to the Roman numerals.
ðə bˈiːdz ɪnðə ʃˈɔːɹɾɚ ɡɹˈuːvz dᵻnˈoʊt fˈaɪvz fˈaɪv jˈuːnɪts, fˈaɪv tˈɛnz, ɛtsˈɛtɹə.ɹᵻzˈɛmblɪŋ ɐ bˈaɪkwˈɪnɚɹi kˈoʊdᵻd dˈɛsɪməl sˈɪstəm ɹᵻlˈeɪɾᵻd tə ðə ɹˈoʊmən nˈuːmɚɹəlz.