-er a-a a-b a-c a-t aaa aab aac aae aaf aak aan aap aar aas aat ab- aba abb abc abe abf abk abn abp abr abs abt ac- aca acb acc ace acf ack acn acp acr acs act aea aeb aec aee aef aek aen aep aer aes aet af- afa afb afc afe aff afk afn afp afr afs aft aka akb akc ake akk akn akp akr aks an- ana anb anc ane anf ank ann anp anr ans ant ap- apa apb apc ape apf apk apn app apr aps apt ar- ara arb arc are arf ark arn arp arr ars art as- asa asb asc ase asf ask asn asp asr ass ast at- ata atb atc ate atf atn atp atr ats att b-p baa bab bac bae baf bak ban bap bar bas bat bba bbb bbc bbe bbf bbk bbn bbp bbr bbs bbt bca bcb bcc bce bcf bck bcn bcp bcr bcs bct be- bea beb bec bee bef bek ben bep ber bes bet bfa bfb bfc bfe bff bfn bfp bfr bfs bft bka bkb bkc bke bkf bkk bkn bkp bkr bks bkt bna bnb bnc bne bnf bnk bnn bnp bnr bns bnt bpa bpb bpc bpe bpf bpn bpp bpr bps bpt bra brb bre brf brk brn brp brr brs brt bsa bsb bsc bse bsf bsk bsn bsp bsr bss bst bta btb btc bte btf btk btn btp btr bts btt c-- caa cab cac cae caf cak can cap car cas cat cba cbb cbc cbe cbf cbk cbn cbp cbr cbs cbt cca ccb ccc cce ccf cck ccn ccp ccr ccs cct ce- cea ceb cec cee cef cek cen cep cer ces cet cfa cfb cfc cfe cff cfk cfn cfp cfr cfs cft cka ckb ckc cks ckt cn- cna cnb cnc cne cnf cnn cnp cnr cns cnt cpa cpb cpc cpe cpf cpk cpn cpp cpr cps cpt cra crb crc cre crf crk crn crp crr crs crt csa csb csc cse csf csk csn csp csr css cst cta ctb ctc cte ctf ctk ctn ctp ctr cts ctt eaa eab eac eae eaf eak ean eap ear eas eat eba ebb ebc ebe ebf ebk ebn ebp ebr ebs ebt ec- eca ecb ecc ece ecf eck ecn ecr ecs ect eea eeb eec eee eef eek een eep eer ees eet ef- efa efb efc efe eff efp efr efs eft eka ekb ekc eke ekf ekp ekr eks ekt en- ena enb enc ene enf enk enn enp enr ens ent ep- epa epb epc epe epf epn epp epr eps ept era erb erc ere erf erk ern erp err ers ert es- esa esb esc ese esf esk esn esp esr ess est eta etb etc ete etf etk etn etp etr ets ett faa fab fac fae faf fak fan fap far fas fat fba fbb fbc fbe fbf fbk fbn fbp fbr fbs fbt fca fcb fcc fce fcf fck fcn fcp fcr fcs fct fea feb fec fee fef fek fen fep fer fes fet ffa ffc ffe fff ffk ffn ffp ffr ffs fft fka fkb fkc fkf fkk fkp fkt fna fnb fnc fne fnf fnk fnn fnp fnr fns fnt fpa fpb fpc fpe fpk fpn fpp fpr fps fpt fra frb frc fre frf frk frn frp frr frs frt fsa fsb fsc fse fsf fsk fsn fsp fsr fss fst fta ftb ftc fte ftf ftk ftn ftp ftr fts ftt k-t ka- kaa kab kac kae kaf kak kan kap kar kas kat kba kbb kbc kbe kbf kbk kbn kbp kbr kbs kca kcb kcc kce kck kcn kcp kcr kcs kct ke- kea keb kec kee kef kek ken kep ker kes ket kfa kfc kff kfs kkb kkc kke kkk kkn kkp kkr kks kkt kn- kna knc kne knf knk knn knp knr knt kpa kpc kpe kpf kpk kpn kpp kpr kps kpt kra krc krf krk krn krp krr krs krt ksa ksb ksc kse ksf ksk ksn ksp ksr kss kst kta ktb ktc kte ktf ktk ktn ktp ktr kts ktt naa nab nac nae naf nak nan nap nar nas nat nba nbb nbc nbe nbf nbk nbn nbp nbr nbs nbt nca ncb ncc nce ncf nck ncn ncp ncr ncs nct ne- nea neb nec nee nef nek nen nep ner nes net nfa nfb nfc nfe nff nfk nfn nfp nfr nfs nft nka nkc nke nkf nkk nkn nkp nkr nks nkt nna nnb nnc nne nnf nnk nnn nnp nns nnt npa npb npc npe npf npn npp npr nps npt nra nrb nrc nre nrf nrk nrn nrp nrr nrs nrt nsa nsb nsc nse nsf nsk nsn nsp nsr nss nst nta ntb ntc nte ntf ntk ntn ntp ntr nts ntt p-p paa pab pac pae paf pak pan pap par pas pat pba pbb pbc pbe pbf pbk pbn pbp pbr pbs pbt pca pcb pcc pce pcf pck pcn pcp pcr pcs pct pea peb pec pee pef pek pen pep per pes pet pfa pfb pfc pfe pff pfk pfn pfp pfr pfs pft pka pkb pkc pke pkf pkn pkp pkr pks pkt pn- pna pnb pnc pne pnf pnk pnn pnp pnr pns pnt ppa ppb ppc ppe ppf ppk ppn ppp ppr pps ppt pra prb prc pre prf prk prn prp prr prs prt ps- psa psb psc pse psf psk psn psp psr pss pst pt- pta ptb ptc pte ptf ptk ptn ptp ptr pts ptt ra- raa rab rac rae raf rak ran rap rar ras rat rba rbb rbc rbe rbf rbk rbn rbp rbr rbs rbt rca rcb rcc rce rcf rcn rcp rcr rcs rct re- rea reb rec ree ref rek ren rep rer res ret