-er a-a a-b a-c aaa aab aac aad aae aam aan aao aar aas aau ab- aba abb abc abd abe abm abn abo abr abs abu ac- aca acb acc acd ace acm acn aco acr acs acu ad- ada adb adc add ade adm adn ado adr ads adu aea aeb aec aed aee aem aen aeo aer aes aeu ama amb amc amd ame amm amn amo amr ams amu an- ana anb anc and ane anm ann ano anr ans anu aoa aob aoc aod aoe aom aon aoo aor aos aou ar- ara arb arc ard are arm arn aro arr ars aru as- asa asb asc asd ase asm asn aso asr ass asu au- aua aub auc aud aue aum aun auo aur aus b-u baa bab bac bad bae bam ban bao bar bas bau bba bbb bbc bbd bbe bbm bbn bbo bbr bbs bbu bca bcb bcc bcd bce bcm bcn bco bcr bcs bcu bda bdb bdc bdd bde bdm bdo bdr bds bdu be- bea beb bec bed bee bem ben beo ber bes beu bma bmb bmc bmd bme bmm bmn bmo bmr bms bmu bna bnb bnc bnd bne bnn bno bnr bns bnu boa bob boc bod boe bom bon boo bor bos bou bra brb brd bre brm brn bro brr brs bru bsa bsb bsc bsd bse bsm bsn bso bsr bss bsu bua bub buc bud bue bum bun buo bur bus buu c-- caa cab cac cad cae cam can cao car cas cau cba cbb cbc cbd cbe cbm cbn cbo cbr cbs cbu cca ccb ccc ccd cce ccm ccn cco ccr ccs ccu cda cdb cdc cdd cde cdm cdn cdo cdr cds cdu ce- cea ceb cec ced cee cem cen ceo cer ces ceu cma cmb cmc cmd cme cmm cmn cmo cmr cms cmu cn- cna cnb cnc cnd cne cnm cnn cno cnr cns cnu co- coa cob coc cod coe com con coo cor cos cou cra crb crc crd cre crm crn cro crr crs cru csa csb csc csd cse csm csn cso csr css csu cua cub cuc cud cue cum cun cuo cur cus cuu daa dab dac dad dae dam dan dao dar das dau dba dbb dbc dbd dbe dbm dbn dbo dbr dbs dbu dca dcb dcc dcd dce dcm dcn dco dcr dcs dcu dda ddb ddc ddd dde ddm ddn ddo ddr dds ddu de- dea deb dec ded dee dem den deo der des deu dma dmb dmc dmd dme dmm dmn dmo dmr dms dmu dna dnb dnc dnd dne dnm dnn dno dnr dns doa dob doc dod doe dom don doo dor dos dou dra drb drc drd dre drm drn dro drr drs dru dsa dsb dsc dsd dse dsm dsn dso dsr dss dsu dua dub duc dud due dum dun duo dur dus eaa eab eac ead eae eam ean eao ear eas eau eba ebb ebc ebd ebe ebm ebn ebo ebr ebs ebu ec- eca ecb ecc ecd ece ecm ecn eco ecr ecs ecu ed- eda edb edc edd ede edm edn edo edr eds edu eea eeb eec eed eee eem een eeo eer ees em- ema emb emc emd eme emm emn emo emr ems emu en- ena enb enc end ene enm enn eno enr ens enu eo- eoa eob eoc eod eoe eom eon eoo eor eos eou era erb erc erd ere erm ern ero err ers eru es- esa esb esc esd ese esm esn eso esr ess esu eu- eua eub euc eud eue eun eur eus m-o m-r maa mab mac mad mae mam man mao mar mas mau mba mbb mbc mbd mbe mbm mbo mbr mbs mbu mc- mca mcb mcc mcd mce mcm mcn mco mcr mcs mcu mda mdb mdc mdd mde mdm mdn mdo mdr mds mdu mea meb mec med mee mem men meo mer mes meu mma mmb mmc mmd mme mmm mmn mmo mmr mms mmu mna mnb mnc mne mnm mnn mno mnr mns mnu moa mob moc mod moe mom mon moo mor mos mou mra mrb mrc mrd mre mrm mrn mro mrr mrs mru msa msb msc msd mse msm msn mso msr mss msu mua mub muc mud mue mum mun mur mus muu naa nab nac nad nae nam nan nao nar nas nau nba nbb nbc nbd nbe nbm nbn nbo nbr nbs nbu nca ncb ncc ncd nce ncm ncn nco ncr ncs ncu nda ndb ndc ndd nde ndm ndn ndo ndr nds ndu ne- nea neb nec ned nee nem nen neo ner nes neu nma nmb nmc nmd nme nmm nmn nmo nmr nms nmu nna nnb nnc nne nnm nnn nno nns nnu no- noa nob noc nod noe nom non noo nor nos nou nra nrb nrc nrd nre nrm nrn nro nrr nrs nru nsa nsb nsc nsd nse nsm nsn nso nsr nss nsu nua nub nuc nud nue num nun nuo nur nus nuu oaa oab oac oad oae oam oan oao oar oas oau ob- oba obb obc obd obe obm obn obo obr obs obu oc- oca ocb occ ocd ocm ocn oco ocr ocs ocu oda odb odc odd ode odm odn odo odr ods odu oea oeb oec oed oee oem oen oeo oer oes om- oma omb omc omd ome omm omn omo omr oms omu on- ona onb onc ond one onn ono onr ons onu oo- ooa oob ooc ood oom oon ooo oor oos or- ora orb orc ord ore orm orn oro orr ors oru os- osa osb osc osd ose osm osn oso osr oss osu ou- oua ouc oud oue oum oun ouo our ous ra- raa rab rac rad rae ram ran rao rar ras rau rba rbb rbc rbd