a-a a-b a-c a-t aaa aab aac aad aae aam aan aas aat aau ab- aba abb abc abd abe abm abn abs abt abu ac- aca acb acc acd ace acm acn acs act acu ad- ada adb adc add ade adm adn ads adt adu aea aeb aec aed aee aem aen aes aet aeu ama amb amc amd ame amm amn ams amt amu an- ana anb anc and ane anm ann ans ant anu as- asa asb asc asd ase asm asn ass ast asu at- ata atb atc atd ate atm atn ats att atu au- aua aub auc aud aue aum aun aus aut b-u baa bab bac bad bae bam ban bas bat bau bba bbb bbc bbd bbe bbm bbn bbs bbt bbu bca bcb bcc bcd bce bcm bcn bcs bct bcu bda bdb bdc bdd bde bdm bds bdt bdu be- bea beb bec bed bee bem ben bes bet beu bma bmb bmc bmd bme bmm bmn bms bmt bmu bna bnb bnc bnd bne bnn bns bnt bnu bsa bsb bsc bsd bse bsm bsn bss bst bsu bta btb btc btd bte btm btn bts btt btu bua bub buc bud bue bum bun bus but buu c-- caa cab cac cad cae cam can cas cat cau cba cbb cbc cbd cbe cbm cbn cbs cbt cbu cca ccb ccc ccd cce ccm ccn ccs cct ccu cda cdb cdc cdd cde cdm cdn cds cdt cdu ce- cea ceb cec ced cee cem cen ces cet ceu cma cmb cmc cmd cme cmm cmn cms cmt cmu cn- cna cnb cnc cnd cne cnm cnn cns cnt cnu csa csb csc csd cse csm csn css cst csu cta ctb ctc ctd cte ctm ctn cts ctt ctu cua cub cuc cud cue cum cun cus cut cuu daa dab dac dad dae dam dan das dat dau dba dbb dbc dbd dbe dbm dbn dbs dbt dbu dca dcb dcc dcd dce dcm dcn dcs dct dcu dda ddb ddc ddd dde ddm ddn dds ddt ddu de- dea deb dec ded dee dem den des det deu dma dmb dmc dmd dme dmm dmn dms dmt dmu dna dnb dnc dnd dne dnm dnn dns dnt dsa dsb dsc dsd dse dsm dsn dss dst dsu dta dtb dtc dtd dte dtm dtn dts dtt dtu dua dub duc dud due dum dun dus dut eaa eab eac ead eae eam ean eas eat eau eba ebb ebc ebd ebe ebm ebn ebs ebt ebu ec- eca ecb ecc ecd ece ecm ecn ecs ect ecu ed- eda edb edc edd ede edm edn eds edt edu eea eeb eec eed eee eem een ees eet em- ema emb emc emd eme emm emn ems emt emu en- ena enb enc end ene enm enn ens ent enu es- esa esb esc esd ese esm esn ess est esu eta etb etc etd ete etm etn ets ett etu eu- eua eub euc eud eue eun eus eut maa mab mac mad mae mam man mas mat mau mba mbb mbc mbd mbe mbm mbs mbt mbu mc- mca mcb mcc mcd mce mcm mcn mcs mct mcu mda mdb mdc mdd mde mdm mdn mds mdt mdu mea meb mec med mee mem men mes met meu mma mmb mmc mmd mme mmm mmn mms mmt mmu mna mnb mnc mne mnm mnn mns mnt mnu msa msb msc msd mse msm msn mss mst msu mta mtb mtc mtd mte mtm mtn mts mtt mtu mua mub muc mud mue mum mun mus mut muu naa nab nac nad nae nam nan nas nat nau nba nbb nbc nbd nbe nbm nbn nbs nbt nbu nca ncb ncc ncd nce ncm ncn ncs nct ncu nda ndb ndc ndd nde ndm ndn nds ndt ndu ne- nea neb nec ned nee nem nen nes net neu nma nmb nmc nmd nme nmm nmn nms nmt nmu nna nnb nnc nne nnm nnn nns nnt nnu nsa nsb nsc nsd nse nsm nsn nss nst nsu nta ntb ntc ntd nte ntm ntn nts ntt ntu nua nub nuc nud nue num nun nus nut nuu saa sab sac sad sae sam san sas sat sau sba sbb sbc sbd sbe sbm sbn sbs sbt sbu sca scb scc scd sce scm scn scs sct scu sda sdb sdc sdd sde sdm sdn sds sdt sdu se- sea seb sec sed see sem sen ses set seu sma smb smc smd sme smm smn sms smt smu sna snb snc snd sne snm snn sns snt snu ss- ssa ssb ssc ssd sse ssm ssn sss sst ssu sta stb stc std ste stm stn sts stt stu sua sub suc sud sue sum sun sus sut suu taa tab tac tad tae tam tan tas tat tau tba tbb tbc tbd tbe tbm tbn tbs tbt tbu tca tcb tcc tcd tce tcm tcn tcs tct tcu tda tdb tdc tdd tde tdm tdn tds tdt tdu te- tea teb tec ted tee tem ten tes tet teu tma tmb tmc tmd tme tmm tmn tms tmt tmu tna tnb tnc tnd tne tnm tnn tns tnt tsa tsb tsc tsd tse tsm tsn tss tst tsu tta ttb ttc ttd tte ttm ttn tts ttt ttu tua tub tuc tud tue tum tun tus tut tuu ua- uaa uab uac uad uae uam uan uas uat uau uba ubb ubc ube ubn ubs ubt ubu uca ucb ucc ucd uce ucm ucn ucs uct ucu uda udb udc udd ude udm udn uds udt udu uea ueb uec ued uee uem uen ues uet um- uma umb umc umd ume umm umn ums umt umu un- una unb unc und une unm unn uns unt unu usa usb usc usd use usm usn uss ust usu uta utb utc utd