-er a-a a-b a-c a-t aaa aab aac aae aaf aam aan aao aar aat aau ab- aba abb abc abe abf abm abn abo abr abt abu ac- aca acb acc ace acf acm acn aco acr act acu aea aeb aec aee aef aem aen aeo aer aet aeu af- afa afb afc afe aff afm afn afo afr aft afu ama amb amc ame amf amm amn amo amr amt amu an- ana anb anc ane anf anm ann ano anr ant anu aoa aob aoc aoe aof aom aon aoo aor aot aou ar- ara arb arc are arf arm arn aro arr art aru at- ata atb atc ate atf atm atn ato atr att atu au- aua aub auc aue auf aum aun auo aur aut b-u baa bab bac bae baf bam ban bao bar bat bau bba bbb bbc bbe bbf bbm bbn bbo bbr bbt bbu bca bcb bcc bce bcf bcm bcn bco bcr bct bcu be- bea beb bec bee bef bem ben beo ber bet beu bfa bfb bfc bfe bff bfm bfn bfo bfr bft bfu bma bmb bmc bme bmf bmm bmn bmo bmr bmt bmu bna bnb bnc bne bnf bnn bno bnr bnt bnu boa bob boc boe bof bom bon boo bor bot bou bra brb bre brf brm brn bro brr brt bru bta btb btc bte btf btm btn bto btr btt btu bua bub buc bue buf bum bun buo bur but buu c-- caa cab cac cae caf cam can cao car cat cau cba cbb cbc cbe cbf cbm cbn cbo cbr cbt cbu cca ccb ccc cce ccf ccm ccn cco ccr cct ccu ce- cea ceb cec cee cef cem cen ceo cer cet ceu cfa cfb cfc cfe cff cfm cfn cfo cfr cft cfu cma cmb cmc cme cmf cmm cmn cmo cmr cmt cmu cn- cna cnb cnc cne cnf cnm cnn cno cnr cnt cnu co- coa cob coc coe cof com con coo cor cot cou cra crb crc cre crf crm crn cro crr crt cru cta ctb ctc cte ctf ctm ctn cto ctr ctt ctu cua cub cuc cue cuf cum cun cuo cur cut cuu eaa eab eac eae eaf eam ean eao ear eat eau eba ebb ebc ebe ebf ebm ebn ebo ebr ebt ebu ec- eca ecb ecc ece ecf ecm ecn eco ecr ect ecu eea eeb eec eee eef eem een eeo eer eet ef- efa efb efc efe eff efm efo efr eft em- ema emb emc eme emf emm emn emo emr emt emu en- ena enb enc ene enf enm enn eno enr ent enu eo- eoa eob eoc eoe eof eom eon eoo eor eot eou era erb erc ere erf erm ern ero err ert eru eta etb etc ete etf etm etn eto etr ett etu eu- eua eub euc eue euf eun eur eut faa fab fac fae faf fam fan fao far fat fau fba fbb fbc fbe fbf fbm fbn fbo fbr fbt fbu fca fcb fcc fce fcf fcm fcn fco fcr fct fcu fea feb fec fee fef fem fen feo fer fet feu ffa ffc ffe fff ffm ffn ffo ffr fft ffu fma fmb fmc fme fmf fmm fmn fmo fmr fmt fmu fna fnb fnc fne fnf fnm fnn fnr fnt fnu foa fob foc foe fof fom fon foo for fot fou fra frb frc fre frf frm frn fro frr frt fru fta ftb ftc fte ftf ftm ftn fto ftr ftt ftu fua fub fue fuf fum fun fuo fur fut fuu m-f m-o m-r maa mab mac mae maf mam man mao mar mat mau mba mbb mbc mbe mbf mbm mbo mbr mbt mbu mc- mca mcb mcc mce mcf mcm mcn mco mcr mct mcu mea meb mec mee mef mem men meo mer met meu mfa mfb mfc mfe mff mfm mfn mfo mfr mft mfu mma mmb mmc mme mmf mmm mmn mmo mmr mmt mmu mna mnb mnc mne mnf mnm mnn mno mnr mnt mnu moa mob moc moe mof mom mon moo mor mot mou mra mrb mrc mre mrf mrm mrn mro mrr mrt mru mta mtb mtc mte mtf mtm mtn mto mtr mtt mtu mua mub muc mue muf mum mun mur mut muu naa nab nac nae naf nam nan nao nar nat nau nba nbb nbc nbe nbf nbm nbn nbo nbr nbt nbu nca ncb ncc nce ncf ncm ncn nco ncr nct ncu ne- nea neb nec nee nef nem nen neo ner net neu nfa nfb nfc nfe nff nfn nfo nfr nft nfu nma nmb nmc nme nmm nmn nmo nmr nmt nmu nna nnb nnc nne nnf nnm nnn nno nnt nnu no- noa nob noc noe nof nom non noo nor not nou nra nrb nrc nre nrf nrm nrn nro nrr nrt nru nta ntb ntc nte ntf ntm ntn nto ntr ntt ntu nua nub nuc nue num nun nuo nur nut nuu oaa oab oac oae oaf oam oan oao oar oat oau ob- oba obb obc obe obf obm obn obo obr obt obu oc- oca ocb occ ocf ocm ocn oco ocr oct ocu oea oeb oec oee oef oem oen oeo oer oet of- ofa ofb ofc ofe off ofm ofn ofo ofr oft ofu om- oma omb omc ome omf omm omn omo omr omt omu on- ona onb onc one onf onn ono onr ont onu oo- ooa oob ooc oof oom oon ooo oor oot or- ora orb orc ore orf orm orn oro orr ort oru ot- ota otb otc ote otf otm otn oto otr ott otu ou- oua ouc oue ouf oum oun ouo our out ra- raa rab rac rae raf ram ran rao rar rat rau rba rbb rbc rbe rbf rbm