-er a-a a-b a-c a-t aaa aab aac aad aae aan aao aar aas aat aau ab- aba abb abc abd abe abn abo abr abs abt abu ac- aca acb acc acd ace acn aco acr acs act acu ad- ada adb adc add ade adn ado adr ads adt adu aea aeb aec aed aee aen aeo aer aes aet aeu an- ana anb anc and ane ann ano anr ans ant anu aoa aob aoc aod aoe aon aoo aor aos aot aou ar- ara arb arc ard are arn aro arr ars art aru as- asa asb asc asd ase asn aso asr ass ast asu at- ata atb atc atd ate atn ato atr ats att atu au- aua aub auc aud aue aun auo aur aus aut b-u baa bab bac bad bae ban bao bar bas bat bau bba bbb bbc bbd bbe bbn bbo bbr bbs bbt bbu bca bcb bcc bcd bce bcn bco bcr bcs bct bcu bda bdb bdc bdd bde bdo bdr bds bdt bdu be- bea beb bec bed bee ben beo ber bes bet beu bna bnb bnc bnd bne bnn bno bnr bns bnt bnu boa bob boc bod boe bon boo bor bos bot bou bra brb brd bre brn bro brr brs brt bru bsa bsb bsc bsd bse bsn bso bsr bss bst bsu bta btb btc btd bte btn bto btr bts btt btu bua bub buc bud bue bun buo bur bus but buu c-- caa cab cac cad cae can cao car cas cat cau cba cbb cbc cbd cbe cbn cbo cbr cbs cbt cbu cca ccb ccc ccd cce ccn cco ccr ccs cct ccu cda cdb cdc cdd cde cdn cdo cdr cds cdt cdu ce- cea ceb cec ced cee cen ceo cer ces cet ceu cn- cna cnb cnc cnd cne cnn cno cnr cns cnt cnu co- coa cob coc cod coe con coo cor cos cot cou cra crb crc crd cre crn cro crr crs crt cru csa csb csc csd cse csn cso csr css cst csu cta ctb ctc ctd cte ctn cto ctr cts ctt ctu cua cub cuc cud cue cun cuo cur cus cut cuu daa dab dac dad dae dan dao dar das dat dau dba dbb dbc dbd dbe dbn dbo dbr dbs dbt dbu dca dcb dcc dcd dce dcn dco dcr dcs dct dcu dda ddb ddc ddd dde ddn ddo ddr dds ddt ddu de- dea deb dec ded dee den deo der des det deu dna dnb dnc dnd dne dnn dno dnr dns dnt doa dob doc dod doe don doo dor dos dot dou dra drb drc drd dre drn dro drr drs drt dru dsa dsb dsc dsd dse dsn dso dsr dss dst dsu dta dtb dtc dtd dte dtn dto dtr dts dtt dtu dua dub duc dud due dun duo dur dus dut eaa eab eac ead eae ean eao ear eas eat eau eba ebb ebc ebd ebe ebn ebo ebr ebs ebt ebu ec- eca ecb ecc ecd ece ecn eco ecr ecs ect ecu ed- eda edb edc edd ede edn edo edr eds edt edu eea eeb eec eed eee een eeo eer ees eet en- ena enb enc end ene enn eno enr ens ent enu eo- eoa eob eoc eod eoe eon eoo eor eos eot eou era erb erc erd ere ern ero err ers ert eru es- esa esb esc esd ese esn eso esr ess est esu eta etb etc etd ete etn eto etr ets ett etu eu- eua eub euc eud eue eun eur eus eut naa nab nac nad nae nan nao nar nas nat nau nba nbb nbc nbd nbe nbn nbo nbr nbs nbt nbu nca ncb ncc ncd nce ncn nco ncr ncs nct ncu nda ndb ndc ndd nde ndn ndo ndr nds ndt ndu ne- nea neb nec ned nee nen neo ner nes net neu nna nnb nnc nne nnn nno nns nnt nnu no- noa nob noc nod noe non noo nor nos not nou nra nrb nrc nrd nre nrn nro nrr nrs nrt nru nsa nsb nsc nsd nse nsn nso nsr nss nst nsu nta ntb ntc ntd nte ntn nto ntr nts ntt ntu nua nub nuc nud nue nun nuo nur nus nut nuu oaa oab oac oad oae oan oao oar oas oat oau ob- oba obb obc obd obe obn obo obr obs obt obu oc- oca ocb occ ocd ocn oco ocr ocs oct ocu oda odb odc odd ode odn odo odr ods odt odu oea oeb oec oed oee oen oeo oer oes oet on- ona onb onc ond one onn ono onr ons ont onu oo- ooa oob ooc ood oon ooo oor oos oot or- ora orb orc ord ore orn oro orr ors ort oru os- osa osb osc osd ose osn oso osr oss ost osu ot- ota otb otc otd ote otn oto otr ots ott otu ou- oua ouc oud oue oun ouo our ous out ra- raa rab rac rad rae ran rao rar ras rat rau rba rbb rbc rbd rbe rbn rbo rbr rbs rbt rbu rca rcb rcc rcd rce rcn rco rcr rcs rct rcu rda rdb rdc rdd rde rdn rdo rdr rds rdt rdu re- rea reb rec red ree ren reo rer res ret reu rna rnb rnc rnd rnn rno rnr rns rnt rnu roa rob roc rod roe ron roo ror ros rot rou rra rrb rrc rrd rrn rrr rrs rrt rru rsa rsb rsc rsd rse rsn rso rsr rss rst rsu rta rtb rtc rtd rte rtn rto rtr rts rtt rtu rua rub ruc rud rue run ruo rur rus rut ruu saa sab sac sad sae san sao sar sas sat sau sba sbb