rmo rmr rmx rna rnb rnc rni rnm rnn rno rnr rnu roa rob roc roe roi rom ron roo ror rou rox rra rrb rrc rri rrm rrn rrr rru rua rub ruc rue rui rum run ruo rur ruu rux rxr ua- uaa uab uac uae uai uam uan uao uar uau uba ubb ubc ube ubi ubn ubo ubr ubu ubx uca ucb ucc uce uci ucm ucn uco ucr ucu uea ueb uec uee uei uem uen uer uia uib uic uie uii uim uin uio uir uiu um- uma umb umc ume umi umm umn umo umr umu un- una unb unc une uni unm unn uno unr unu unx uoa uob uoc uoe uom uon uoo uor uox ur- ura urb urc ure uri urm urn uro urr uru urx uua uuc uue uum uun uur uuu uxb uxc uxo uxr uxu xaa xac xam xan xar xau xbc xbe xbr xbx xcb xci xcr xcx xee xem xen xer xeu xex xia xic xie xii xin xio xiu xix xma xmc xmi xmm xmo xmr xmu xmx xna xnc xno xnu xoa xoc xoi xom xon xoo xor xox xrc xrx xue xui xun xxi xxo xxx