rmm rmo rmr roa rob roc rod roe roi rom roo ror rou roz rra rrb rrc rrd rri rrm rrr rru rua rub ruc rud rue rui rum ruo rur ruu ruz rza rzb rze rzm rzo ua- uaa uab uac uad uae uai uam uao uar uau uaz uba ubb ubc ube ubi ubo ubr ubu uca ucb ucc ucd uce uci ucm uco ucr ucu uda udb udc udd ude udi udm udo udr udu uea ueb uec ued uee uei uem uer uia uib uic uid uie uii uim uio uir uiu um- uma umb umc umd ume umi umm umo umr umu uoa uob uoc uod uoe uom uoo uor ur- ura urb urc urd ure uri urm uro urr uru urz uua uuc uue uum uur uuu uza uzb uzi uzo uzu zaa zab zac zad zai zam zao zar zaz zbb zbc zbm zbr zce zco zdm zea zeb zec zed zee zem zeo zer zez zia zib zid zie zim zio zir ziz zma zmb zmc zmd zmm zo- zoa zob zoc zod zoe zoi zom zoo zor zou zro zub zuc zud zui zum zur zuz zzr zzz