a-a a-b a-c aaa aab aac aam aan aao aar aas aau aav ab- aba abb abc abm abn abo abr abs abu abv ac- aca acb acc acm acn aco acr acs acu acv ama amb amc amm amn amo amr ams amu amv an- ana anb anc anm ann ano anr ans anu anv aoa aob aoc aom aon aoo aor aos aou aov ar- ara arb arc arm arn aro arr ars aru arv as- asa asb asc asm asn aso asr ass asu asv au- aua aub auc aum aun auo aur aus auv av- ava avb avc avm avn avo avr avs avu b-u baa bab bac bam ban bao bar bas bau bav bba bbb bbc bbm bbn bbo bbr bbs bbu bca bcb bcc bcm bcn bco bcr bcs bcu bcv bma bmb bmc bmm bmn bmo bmr bms bmu bmv bna bnb bnc bnn bno bnr bns bnu bnv boa bob boc bom bon boo bor bos bou bov bra brb brm brn bro brr brs bru brv bsa bsb bsc bsm bsn bso bsr bss bsu bsv bua bub buc bum bun buo bur bus buu bva bvb bvc bvm bvn bvo bvr bvs bvu bvv c-- caa cab cac cam can cao car cas cau cav cba cbb cbc cbm cbn cbo cbr cbs cbu cbv cca ccb ccc ccm ccn cco ccr ccs ccu ccv cma cmb cmc cmm cmn cmo cmr cms cmu cmv cn- cna cnb cnc cnm cnn cno cnr cns cnu cnv co- coa cob coc com con coo cor cos cou cov cra crb crc crm crn cro crr crs cru crv csa csb csc csm csn cso csr css csu csv cua cub cuc cum cun cuo cur cus cuu cuv cva cvb cvc cvm cvn cvo cvr cvs cvu cvv m-o m-r m-v maa mab mac mam man mao mar mas mau mav mba mbb mbc mbm mbo mbr mbs mbu mbv mc- mca mcb mcc mcm mcn mco mcr mcs mcu mcv mma mmb mmc mmm mmn mmo mmr mms mmu mmv mna mnb mnc mnm mnn mno mnr mns mnu moa mob moc mom mon moo mor mos mou mov mra mrb mrc mrm mrn mro mrr mrs mru mrv msa msb msc msm msn mso msr mss msu msv mua mub muc mum mun mur mus muu mva mvb mvc mvm mvn mvo mvr mvs mvv naa nab nac nam nan nao nar nas nau nav nba nbb nbc nbm nbn nbo nbr nbs nbu nbv nca ncb ncc ncm ncn nco ncr ncs ncu ncv nma nmb nmc nmm nmn nmo nmr nms nmu nna nnb nnc nnm nnn nno nns nnu nnv no- noa nob noc nom non noo nor nos nou nov nra nrb nrc nrm nrn nro nrr nrs nru nrv nsa nsb nsc nsm nsn nso nsr nss nsu nsv nua nub nuc num nun nuo nur nus nuu nuv nva nvb nvc nvm nvn nvu nvv oaa oab oac oam oan oao oar oas oau oav ob- oba obb obc obm obn obo obr obs obu obv oc- oca ocb occ ocm ocn oco ocr ocs ocu ocv om- oma omb omc omm omn omo omr oms omu omv on- ona onb onc onn ono onr ons onu oo- ooa oob ooc oom oon ooo oor oos oov or- ora orb orc orm orn oro orr ors oru orv os- osa osb osc osm osn oso osr oss osu osv ou- oua ouc oum oun ouo our ous ov- ova ovb ovc ovo ovs ovv ra- raa rab rac ram ran rao rar ras rau rav rba rbb rbc rbm rbn rbo rbr rbs rbu rca rcb rcc rcm rcn rco rcr rcs rcu rcv rma rmb rmc rmm rmn rmo rmr rms rmv rna rnb rnc rnm rnn rno rnr rns rnu rnv roa rob roc rom ron roo ror ros rou rov rra rrb rrc rrm rrn rrr rrs rru rsa rsb rsc rsm rsn rso rsr rss rsu rsv rua rub ruc rum run ruo rur rus ruu ruv rva rvb rvc rvm rvn rvo rvr rvs rvu rvv saa sab sac sam san sao sar sas sau sav sba sbb sbc sbm sbn sbo sbr sbs sbu sbv sca scb scc scm scn sco scr scs scu scv sma smb smc smm smn smo smr sms smu smv sna snb snc snm snn sno snr sns snu snv soa sob soc som son soo sor sos sou sov sr- sra srb src srm srn sro srr srs srv ss- ssa ssb ssc ssm ssn sso ssr sss ssu ssv sua sub suc sum sun suo sur sus suu suv sva svb svc svm svn svo svr svs svu svv ua- uaa uab uac uam uan uao uar uas uau uav uba ubb ubc ubn ubo ubr ubs ubu ubv uca ucb ucc ucm ucn uco ucr ucs ucu ucv um- uma umb umc umm umn umo umr ums umu un- una unb unc unm unn uno unr uns unu unv uoa uob uoc uom uon uoo uor uos ur- ura urb urc urm urn uro urr urs uru usa usb usc usm usn uso usr uss usu usv uua uuc uum uun uur uus uuu uva uvb uvc uvm uvo uvs uvu uvv v-a vaa vab vac vam van vao var vas vau vav vba vbc vbm vbo vbr vbs vbv vca vcc vcm vcn vco vcr vcs vcu vm- vma vmc vmm vmn vmo vmr vmu vn- vna vnm vno vnr vns vnu vnv voa vob voc vom von voo vor vos vou vov vra vrb vrc vrm vrn vrr vrs vru vsa vsb vsc vsm vsn vso vsr vss vsu vsv vum vur vus vuv vva vvb vvc vvm vvo vvr vvs vvv