-er a-a a-b a-c aaa aab aac aad aae aam aan aao aar aau ab- aba abb abc abd abe abm abn abo abr abu ac- aca acb acc acd ace acm acn aco acr acu ad- ada adb adc add ade adm adn ado adr adu aea aeb aec aed aee aem aen aeo aer aeu ama amb amc amd ame amm amn amo amr amu an- ana anb anc and ane anm ann ano anr anu aoa aob aoc aod aoe aom aon aoo aor aou ar- ara arb arc ard are arm arn aro arr aru au- aua aub auc aud aue aum aun auo aur b-u baa bab bac bad bae bam ban bao bar bau bba bbb bbc bbd bbe bbm bbn bbo bbr bbu bca bcb bcc bcd bce bcm bcn bco bcr bcu bda bdb bdc bdd bde bdm bdo bdr bdu be- bea beb bec bed bee bem ben beo ber beu bma bmb bmc bmd bme bmm bmn bmo bmr bmu bna bnb bnc bnd bne bnn bno bnr bnu boa bob boc bod boe bom bon boo bor bou bra brb brd bre brm brn bro brr bru bua bub buc bud bue bum bun buo bur buu c-- caa cab cac cad cae cam can cao car cau cba cbb cbc cbd cbe cbm cbn cbo cbr cbu cca ccb ccc ccd cce ccm ccn cco ccr ccu cda cdb cdc cdd cde cdm cdn cdo cdr cdu ce- cea ceb cec ced cee cem cen ceo cer ceu cma cmb cmc cmd cme cmm cmn cmo cmr cmu cn- cna cnb cnc cnd cne cnm cnn cno cnr cnu co- coa cob coc cod coe com con coo cor cou cra crb crc crd cre crm crn cro crr cru cua cub cuc cud cue cum cun cuo cur cuu daa dab dac dad dae dam dan dao dar dau dba dbb dbc dbd dbe dbm dbn dbo dbr dbu dca dcb dcc dcd dce dcm dcn dco dcr dcu dda ddb ddc ddd dde ddm ddn ddo ddr ddu de- dea deb dec ded dee dem den deo der deu dma dmb dmc dmd dme dmm dmn dmo dmr dmu dna dnb dnc dnd dne dnm dnn dno dnr doa dob doc dod doe dom don doo dor dou dra drb drc drd dre drm drn dro drr dru dua dub duc dud due dum dun duo dur eaa eab eac ead eae eam ean eao ear eau eba ebb ebc ebd ebe ebm ebn ebo ebr ebu ec- eca ecb ecc ecd ece ecm ecn eco ecr ecu ed- eda edb edc edd ede edm edn edo edr edu eea eeb eec eed eee eem een eeo eer em- ema emb emc emd eme emm emn emo emr emu en- ena enb enc end ene enm enn eno enr enu eo- eoa eob eoc eod eoe eom eon eoo eor eou era erb erc erd ere erm ern ero err eru eu- eua eub euc eud eue eun eur m-o m-r maa mab mac mad mae mam man mao mar mau mba mbb mbc mbd mbe mbm mbo mbr mbu mc- mca mcb mcc mcd mce mcm mcn mco mcr mcu mda mdb mdc mdd mde mdm mdn mdo mdr mdu mea meb mec med mee mem men meo mer meu mma mmb mmc mmd mme mmm mmn mmo mmr mmu mna mnb mnc mne mnm mnn mno mnr mnu moa mob moc mod moe mom mon moo mor mou mra mrb mrc mrd mre mrm mrn mro mrr mru mua mub muc mud mue mum mun mur muu naa nab nac nad nae nam nan nao nar nau nba nbb nbc nbd nbe nbm nbn nbo nbr nbu nca ncb ncc ncd nce ncm ncn nco ncr ncu nda ndb ndc ndd nde ndm ndn ndo ndr ndu ne- nea neb nec ned nee nem nen neo ner neu nma nmb nmc nmd nme nmm nmn nmo nmr nmu nna nnb nnc nne nnm nnn nno nnu no- noa nob noc nod noe nom non noo nor nou nra nrb nrc nrd nre nrm nrn nro nrr nru nua nub nuc nud nue num nun nuo nur nuu oaa oab oac oad oae oam oan oao oar oau ob- oba obb obc obd obe obm obn obo obr obu oc- oca ocb occ ocd ocm ocn oco ocr ocu oda odb odc odd ode odm odn odo odr odu oea oeb oec oed oee oem oen oeo oer om- oma omb omc omd ome omm omn omo omr omu on- ona onb onc ond one onn ono onr onu oo- ooa oob ooc ood oom oon ooo oor or- ora orb orc ord ore orm orn oro orr oru ou- oua ouc oud oue oum oun ouo our ra- raa rab rac rad rae ram ran rao rar rau rba rbb rbc rbd rbe rbm rbn rbo rbr rbu rca rcb rcc rcd rce rcm rcn rco rcr rcu rda rdb rdc rdd rde rdm rdn rdo rdr rdu re- rea reb rec red ree rem ren reo rer reu rma rmb rmc rmd rme rmm rmn rmo rmr rna rnb rnc rnd rnm rnn rno rnr rnu roa rob roc rod roe rom ron roo ror rou rra rrb rrc rrd rrm rrn rrr rru rua rub ruc rud rue rum run ruo rur ruu ua- uaa uab uac uad uae uam uan uao uar uau uba ubb ubc ube ubn ubo ubr ubu uca ucb ucc ucd uce ucm ucn uco ucr ucu uda udb udc udd ude udm udn udo udr udu uea ueb uec ued uee uem uen uer um- uma umb umc umd ume umm umn umo umr umu un- una unb unc und une unm unn uno unr unu uoa uob uoc uod uoe uom uon uoo uor ur- ura urb urc urd ure urm urn uro urr uru