-er a-a a-b a-c aaa aab aac aad aae aaf aam aan aao aar aas aau ab- aba abb abc abd abe abf abm abn abo abr abs abu ac- aca acb acc acd ace acf acm acn aco acr acs acu ad- ada adb adc add ade adf adm adn ado adr ads adu aea aeb aec aed aee aef aem aen aeo aer aes aeu af- afa afb afc afd afe aff afm afn afo afr afs afu ama amb amc amd ame amf amm amn amo amr ams amu an- ana anb anc and ane anf anm ann ano anr ans anu aoa aob aoc aod aoe aof aom aon aoo aor aos aou ar- ara arb arc ard are arf arm arn aro arr ars aru as- asa asb asc asd ase asf asm asn aso asr ass asu au- aua aub auc aud aue auf aum aun auo aur aus b-u baa bab bac bad bae baf bam ban bao bar bas bau bba bbb bbc bbd bbe bbf bbm bbn bbo bbr bbs bbu bca bcb bcc bcd bce bcf bcm bcn bco bcr bcs bcu bda bdb bdc bdd bde bdf bdm bdo bdr bds bdu be- bea beb bec bed bee bef bem ben beo ber bes beu bfa bfb bfc bfd bfe bff bfm bfn bfo bfr bfs bfu bma bmb bmc bmd bme bmf bmm bmn bmo bmr bms bmu bna bnb bnc bnd bne bnf bnn bno bnr bns bnu boa bob boc bod boe bof bom bon boo bor bos bou bra brb brd bre brf brm brn bro brr brs bru bsa bsb bsc bsd bse bsf bsm bsn bso bsr bss bsu bua bub buc bud bue buf bum bun buo bur bus buu c-- caa cab cac cad cae caf cam can cao car cas cau cba cbb cbc cbd cbe cbf cbm cbn cbo cbr cbs cbu cca ccb ccc ccd cce ccf ccm ccn cco ccr ccs ccu cda cdb cdc cdd cde cdf cdm cdn cdo cdr cds cdu ce- cea ceb cec ced cee cef cem cen ceo cer ces ceu cfa cfb cfc cfd cfe cff cfm cfn cfo cfr cfs cfu cma cmb cmc cmd cme cmf cmm cmn cmo cmr cms cmu cn- cna cnb cnc cnd cne cnf cnm cnn cno cnr cns cnu co- coa cob coc cod coe cof com con coo cor cos cou cra crb crc crd cre crf crm crn cro crr crs cru csa csb csc csd cse csf csm csn cso csr css csu cua cub cuc cud cue cuf cum cun cuo cur cus cuu daa dab dac dad dae daf dam dan dao dar das dau dba dbb dbc dbd dbe dbf dbm dbn dbo dbr dbs dbu dca dcb dcc dcd dce dcf dcm dcn dco dcr dcs dcu dda ddb ddc ddd dde ddf ddm ddn ddo ddr dds ddu de- dea deb dec ded dee def dem den deo der des deu dfa dfb dfc dfd dfe dff dfm dfn dfo dfr dfs dfu dma dmb dmc dmd dme dmf dmm dmn dmo dmr dms dmu dna dnb dnc dnd dne dnf dnm dnn dno dnr dns doa dob doc dod doe dof dom don doo dor dos dou dra drb drc drd dre drm drn dro drr drs dru dsa dsb dsc dsd dse dsf dsm dsn dso dsr dss dsu dua dub duc dud due duf dum dun duo dur dus eaa eab eac ead eae eaf eam ean eao ear eas eau eba ebb ebc ebd ebe ebf ebm ebn ebo ebr ebs ebu ec- eca ecb ecc ecd ece ecf ecm ecn eco ecr ecs ecu ed- eda edb edc edd ede edf edm edn edo edr eds edu eea eeb eec eed eee eef eem een eeo eer ees ef- efa efb efc efd efe eff efm efo efr efs em- ema emb emc emd eme emf emm emn emo emr ems emu en- ena enb enc end ene enf enm enn eno enr ens enu eo- eoa eob eoc eod eoe eof eom eon eoo eor eos eou era erb erc erd ere erf erm ern ero err ers eru es- esa esb esc esd ese esf esm esn eso esr ess esu eu- eua eub euc eud eue euf eun eur eus faa fab fac fad fae faf fam fan fao far fas fau fba fbb fbc fbd fbe fbf fbm fbn fbo fbr fbs fbu fca fcb fcc fcd fce fcf fcm fcn fco fcr fcs fcu fda fdb fdc fdd fde fdf fdm fdn fdo fdr fds fdu fea feb fec fed fee fef fem fen feo fer fes feu ffa ffc ffd ffe fff ffm ffn ffo ffr ffs ffu fma fmb fmc fmd fme fmf fmm fmn fmo fmr fms fmu fna fnb fnc fnd fne fnf fnm fnn fnr fns fnu foa fob foc foe fof fom fon foo for fos fou fra frb frc frd fre frf frm frn fro frr frs fru fsa fsb fsc fsd fse fsf fsm fsn fso fsr fss fsu fua fub fud fue fuf fum fun fuo fur fus fuu m-f m-o m-r maa mab mac mad mae maf mam man mao mar mas mau mba mbb mbc mbd mbe mbf mbm mbo mbr mbs mbu mc- mca mcb mcc mcd mce mcf mcm mcn mco mcr mcs mcu mda mdb mdc mdd mde mdf mdm mdn mdo mdr mds mdu mea meb mec med mee mef mem men meo mer mes meu mfa mfb mfc mfd mfe mff mfm mfn mfo mfr mfs mfu mma mmb mmc mmd mme mmf mmm mmn mmo mmr mms mmu mna mnb mnc mne mnf mnm mnn mno mnr mns mnu moa mob moc mod moe mof mom mon moo mor mos mou mra mrb mrc mrd mre mrf mrm mrn mro mrr mrs mru msa msb msc msd