-er a-a a-b a-c a-t aaa aab aac aae aan aao aap aar aas aat ab- aba abb abc abe abn abo abp abr abs abt ac- aca acb acc ace acn aco acp acr acs act aea aeb aec aee aen aeo aep aer aes aet an- ana anb anc ane ann ano anp anr ans ant aoa aob aoc aoe aon aoo aop aor aos aot ap- apa apb apc ape apn apo app apr aps apt ar- ara arb arc are arn aro arp arr ars art as- asa asb asc ase asn aso asp asr ass ast at- ata atb atc ate atn ato atp atr ats att b-p baa bab bac bae ban bao bap bar bas bat bba bbb bbc bbe bbn bbo bbp bbr bbs bbt bca bcb bcc bce bcn bco bcp bcr bcs bct be- bea beb bec bee ben beo bep ber bes bet bna bnb bnc bne bnn bno bnp bnr bns bnt boa bob boc boe bon boo bop bor bos bot bpa bpb bpc bpe bpn bpo bpp bpr bps bpt bra brb bre brn bro brp brr brs brt bsa bsb bsc bse bsn bso bsp bsr bss bst bta btb btc bte btn bto btp btr bts btt c-- caa cab cac cae can cao cap car cas cat cba cbb cbc cbe cbn cbo cbp cbr cbs cbt cca ccb ccc cce ccn cco ccp ccr ccs cct ce- cea ceb cec cee cen ceo cep cer ces cet cn- cna cnb cnc cne cnn cno cnp cnr cns cnt co- coa cob coc coe con coo cop cor cos cot cpa cpb cpc cpe cpn cpo cpp cpr cps cpt cra crb crc cre crn cro crp crr crs crt csa csb csc cse csn cso csp csr css cst cta ctb ctc cte ctn cto ctp ctr cts ctt eaa eab eac eae ean eao eap ear eas eat eba ebb ebc ebe ebn ebo ebp ebr ebs ebt ec- eca ecb ecc ece ecn eco ecr ecs ect eea eeb eec eee een eeo eep eer ees eet en- ena enb enc ene enn eno enp enr ens ent eo- eoa eob eoc eoe eon eoo eop eor eos eot ep- epa epb epc epe epn epo epp epr eps ept era erb erc ere ern ero erp err ers ert es- esa esb esc ese esn eso esp esr ess est eta etb etc ete etn eto etp etr ets ett naa nab nac nae nan nao nap nar nas nat nba nbb nbc nbe nbn nbo nbp nbr nbs nbt nca ncb ncc nce ncn nco ncp ncr ncs nct ne- nea neb nec nee nen neo nep ner nes net nna nnb nnc nne nnn nno nnp nns nnt no- noa nob noc noe non noo nop nor nos not npa npb npc npe npn npo npp npr nps npt nra nrb nrc nre nrn nro nrp nrr nrs nrt nsa nsb nsc nse nsn nso nsp nsr nss nst nta ntb ntc nte ntn nto ntp ntr nts ntt oaa oab oac oae oan oao oap oar oas oat ob- oba obb obc obe obn obo obp obr obs obt oc- oca ocb occ ocn oco ocp ocr ocs oct oea oeb oec oee oen oeo oep oer oes oet on- ona onb onc one onn ono onp onr ons ont oo- ooa oob ooc oon ooo oop oor oos oot op- opa opb opc ope opn opo opp opr ops opt or- ora orb orc ore orn oro orp orr ors ort os- osa osb osc ose osn oso osp osr oss ost ot- ota otb otc ote otn oto otp otr ots ott p-p paa pab pac pae pan pao pap par pas pat pba pbb pbc pbe pbn pbo pbp pbr pbs pbt pca pcb pcc pce pcn pco pcp pcr pcs pct pea peb pec pee pen peo pep per pes pet pn- pna pnb pnc pne pnn pno pnp pnr pns pnt poa pob poc poe pon poo pop por pos pot ppa ppb ppc ppe ppn ppo ppp ppr pps ppt pra prb prc pre prn pro prp prr prs prt ps- psa psb psc pse psn pso psp psr pss pst pt- pta ptb ptc pte ptn pto ptp ptr pts ptt ra- raa rab rac rae ran rao rap rar ras rat rba rbb rbc rbe rbn rbo rbp rbr rbs rbt rca rcb rcc rce rcn rco rcp rcr rcs rct re- rea reb rec ree ren reo rep rer res ret rna rnb rnc rnn rno rnp rnr rns rnt roa rob roc roe ron roo rop ror ros rot rpa rpb rpc rpe rpn rpo rpp rpr rps rpt rra rrb rrc rrn rrp rrr rrs rrt rsa rsb rsc rse rsn rso rsp rsr rss rst rta rtb rtc rte rtn rto rtp rtr rts rtt saa sab sac sae san sao sap sar sas sat sba sbb sbc sbe sbn sbo sbp sbr sbs sbt sca scb scc sce scn sco scp scr scs sct se- sea seb sec see sen seo sep ser ses set sna snb snc sne snn sno snp snr sns snt soa sob soc soe son soo sop sor sos sot spa spb spc spe spn spo spp spr sps spt sr- sra srb src sre srn sro srp srr srs srt ss- ssa ssb ssc sse ssn sso ssp ssr sss sst sta stb stc ste stn sto stp str sts stt taa tab tac tae tan tao tap tar tas tat tba tbb tbc tbe tbn tbo tbp tbr tbs tbt tca tcb tcc tce tcn tco tcp tcr tcs tct te- tea teb tec tee ten teo tep ter tes tet tna tnb tnc tne tnn tno tnp tnr tns tnt to- toa tob toc toe ton too top tor tos tot tpa tpb tpc tpe