Ratio XCIX CXXI CLXXXVII BWED20 cum CDXCIII CCLXXXIX CCCXCI DXCV DCCXXXI DCCCXLI MIII MCCXXV MDV MDCCCXLIX MMLXV MMDXXXVII MMMCDLXXXI (IV)CLXXXIX (V)CXXXIII