reb rec ree rel rem ren reo rer reu rev rla rlc rle rll rlm rln rlo rlr rlu rma rmb rmc rme rml rmm rmn rmo rmr rmv rna rnb rnc rnm rnn rno rnr rnu rnv roa rob roc roe rol rom ron roo ror rou rov rra rrb rrc rrl rrm rrn rrr rru rua rub ruc rue rum run ruo rur ruu ruv rva rvb rvc rve rvl rvm rvn rvo rvr rvu rvv ua- uaa uab uac uae ual uam uan uao uar uau uav uba ubb ubc ube ubl ubn ubo ubr ubu ubv uca ucb ucc uce ucl ucm ucn uco ucr ucu ucv uea ueb uec uee uel uem uen uer ula ulb ulc ule ull ulm uln ulo ulr ulu ulv um- uma umb umc ume uml umm umn umo umr umu un- una unb unc une unl unm unn uno unr unu unv uoa uob uoc uoe uol uom uon uoo uor ur- ura urb urc ure url urm urn uro urr uru uua uuc uue uum uun uur uuu uva uvb uvc uve uvl uvm uvo uvu uvv v-a v-e vaa vab vac vae val vam van vao var vau vav vba vbc vbl vbm vbo vbr vbv vca vcc vce vcl vcm vcn vco vcr vcu vea veb vec vee vel vem ven veo ver veu vl- vla vlb vlc vle vll vlm vlo vlv vm- vma vmc vmm vmn vmo vmr vmu vn- vna vnl vnm vno vnr vnu vnv voa vob voc voe vol vom von voo vor vou vov vra vrb vrc vre vrm vrn vrr vru vue vul vum vur vuv vva vvb vvc vvm vvo vvr vvv