-er a-a a-b a-c a-t aaa aab aac aad aae aak aan aao aar aas aat aau ab- aba abb abc abd abe abk abn abo abr abs abt abu ac- aca acb acc acd ace ack acn aco acr acs act acu ad- ada adb adc add ade adk adn ado adr ads adt adu aea aeb aec aed aee aek aen aeo aer aes aet aeu aka akb akc akd ake akk akn ako akr aks aku an- ana anb anc and ane ank ann ano anr ans ant anu aoa aob aoc aod aoe aok aon aoo aor aos aot aou ar- ara arb arc ard are ark arn aro arr ars art aru as- asa asb asc asd ase ask asn aso asr ass ast asu at- ata atb atc atd ate atn ato atr ats att atu au- aua aub auc aud aue auk aun auo aur aus aut b-u baa bab bac bad bae bak ban bao bar bas bat bau bba bbb bbc bbd bbe bbk bbn bbo bbr bbs bbt bbu bca bcb bcc bcd bce bck bcn bco bcr bcs bct bcu bda bdb bdc bdd bde bdk bdo bdr bds bdt bdu be- bea beb bec bed bee bek ben beo ber bes bet beu bka bkb bkc bke bkk bkn bko bkr bks bkt bna bnb bnc bnd bne bnk bnn bno bnr bns bnt bnu boa bob boc bod boe bok bon boo bor bos bot bou bra brb brd bre brk brn bro brr brs brt bru bsa bsb bsc bsd bse bsk bsn bso bsr bss bst bsu bta btb btc btd bte btk btn bto btr bts btt btu bua bub buc bud bue buk bun buo bur bus but buu c-- caa cab cac cad cae cak can cao car cas cat cau cba cbb cbc cbd cbe cbk cbn cbo cbr cbs cbt cbu cca ccb ccc ccd cce cck ccn cco ccr ccs cct ccu cda cdb cdc cdd cde cdk cdn cdo cdr cds cdt cdu ce- cea ceb cec ced cee cek cen ceo cer ces cet ceu cka ckb ckc ckd cko cks ckt cn- cna cnb cnc cnd cne cnn cno cnr cns cnt cnu co- coa cob coc cod coe cok con coo cor cos cot cou cra crb crc crd cre crk crn cro crr crs crt cru csa csb csc csd cse csk csn cso csr css cst csu cta ctb ctc ctd cte ctk ctn cto ctr cts ctt ctu cua cub cuc cud cue cuk cun cuo cur cus cut cuu daa dab dac dad dae dak dan dao dar das dat dau dba dbb dbc dbd dbe dbk dbn dbo dbr dbs dbt dbu dca dcb dcc dcd dce dck dcn dco dcr dcs dct dcu dda ddb ddc ddd dde ddk ddn ddo ddr dds ddt ddu de- dea deb dec ded dee dek den deo der des det deu dka dkb dkc dke dkk dko dkr dks dkt dku dna dnb dnc dnd dne dnk dnn dno dnr dns dnt doa dob doc dod doe dok don doo dor dos dot dou dra drb drc drd dre drk drn dro drr drs drt dru dsa dsb dsc dsd dse dsk dsn dso dsr dss dst dsu dta dtb dtc dtd dte dtk dtn dto dtr dts dtt dtu dua dub duc dud due duk dun duo dur dus dut eaa eab eac ead eae eak ean eao ear eas eat eau eba ebb ebc ebd ebe ebk ebn ebo ebr ebs ebt ebu ec- eca ecb ecc ecd ece eck ecn eco ecr ecs ect ecu ed- eda edb edc edd ede edk edn edo edr eds edt edu eea eeb eec eed eee eek een eeo eer ees eet eka ekb ekc ekd eke eko ekr eks ekt eku en- ena enb enc end ene enk enn eno enr ens ent enu eo- eoa eob eoc eod eoe eok eon eoo eor eos eot eou era erb erc erd ere erk ern ero err ers ert eru es- esa esb esc esd ese esk esn eso esr ess est esu eta etb etc etd ete etk etn eto etr ets ett etu eu- eua eub euc eud eue eun eur eus eut k-t ka- kaa kab kac kad kae kak kan kao kar kas kat kau kba kbb kbc kbd kbe kbk kbn kbo kbr kbs kbu kca kcb kcc kcd kce kck kcn kcr kcs kct kcu kda kdb kdc kde kdk kdo kdr kds kdt kdu ke- kea keb kec ked kee kek ken keo ker kes ket kkb kkc kke kkk kkn kkr kks kkt kku kn- kna knc knd kne knk knn kno knr knt knu koa kob koc kod koe kok kon koo kor kos kot kou kra krc krd krk krn kro krr krs krt kru ksa ksb ksc ksd kse ksk ksn kso ksr kss kst ksu kta ktb ktc kte ktk ktn kto ktr kts ktt ktu kub kuc kud kue kuk kun kur kus kut kuu naa nab nac nad nae nak nan nao nar nas nat nau nba nbb nbc nbd nbe nbk nbn nbo nbr nbs nbt nbu nca ncb ncc ncd nce nck ncn nco ncr ncs nct ncu nda ndb ndc ndd nde ndk ndn ndo ndr nds ndt ndu ne- nea neb nec ned nee nek nen neo ner nes net neu nka nkc nke nkk nkn nko nkr nks nkt nku nna nnb nnc nne nnk nnn nno nns nnt nnu no- noa nob noc nod noe nok non noo nor nos not nou nra nrb nrc nrd nre nrk nrn nro nrr nrs nrt nru nsa nsb nsc nsd nse nsk nsn nso nsr nss nst nsu nta ntb ntc ntd nte ntk ntn nto ntr nts ntt ntu nua nub nuc nud nue nuk nun nuo nur nus nut nuu oaa oab