-er a-a a-b a-c a-t aaa aab aac aae aam aao aap aar aas aat ab- aba abb abc abe abm abo abp abr abs abt ac- aca acb acc ace acm aco acp acr acs act aea aeb aec aee aem aeo aep aer aes aet ama amb amc ame amm amo amp amr ams amt aoa aob aoc aoe aom aoo aop aor aos aot ap- apa apb apc ape apm apo app apr aps apt ar- ara arb arc are arm aro arp arr ars art as- asa asb asc ase asm aso asp asr ass ast at- ata atb atc ate atm ato atp atr ats att b-p baa bab bac bae bam bao bap bar bas bat bba bbb bbc bbe bbm bbo bbp bbr bbs bbt bca bcb bcc bce bcm bco bcp bcr bcs bct be- bea beb bec bee bem beo bep ber bes bet bma bmb bmc bme bmm bmo bmp bmr bms bmt boa bob boc boe bom boo bop bor bos bot bpa bpb bpc bpe bpm bpo bpp bpr bps bpt bra brb bre brm bro brp brr brs brt bsa bsb bsc bse bsm bso bsp bsr bss bst bta btb btc bte btm bto btp btr bts btt c-- caa cab cac cae cam cao cap car cas cat cba cbb cbc cbe cbm cbo cbp cbr cbs cbt cca ccb ccc cce ccm cco ccp ccr ccs cct ce- cea ceb cec cee cem ceo cep cer ces cet cma cmb cmc cme cmm cmo cmp cmr cms cmt co- coa cob coc coe com coo cop cor cos cot cpa cpb cpc cpe cpm cpo cpp cpr cps cpt cra crb crc cre crm cro crp crr crs crt csa csb csc cse csm cso csp csr css cst cta ctb ctc cte ctm cto ctp ctr cts ctt eaa eab eac eae eam eao eap ear eas eat eba ebb ebc ebe ebm ebo ebp ebr ebs ebt ec- eca ecb ecc ece ecm eco ecr ecs ect eea eeb eec eee eem eeo eep eer ees eet em- ema emb emc eme emm emo emp emr ems emt eo- eoa eob eoc eoe eom eoo eop eor eos eot ep- epa epb epc epe epm epo epp epr eps ept era erb erc ere erm ero erp err ers ert es- esa esb esc ese esm eso esp esr ess est eta etb etc ete etm eto etp etr ets ett m-o m-r maa mab mac mae mam mao map mar mas mat mba mbb mbc mbe mbm mbo mbp mbr mbs mbt mc- mca mcb mcc mce mcm mco mcp mcr mcs mct mea meb mec mee mem meo mep mer mes met mma mmb mmc mme mmm mmo mmp mmr mms mmt moa mob moc moe mom moo mop mor mos mot mpa mpb mpc mpe mpm mpo mpp mpr mps mpt mra mrb mrc mre mrm mro mrp mrr mrs mrt msa msb msc mse msm mso msp msr mss mst mta mtb mtc mte mtm mto mtp mtr mts mtt oaa oab oac oae oam oao oap oar oas oat ob- oba obb obc obe obm obo obp obr obs obt oc- oca ocb occ ocm oco ocp ocr ocs oct oea oeb oec oee oem oeo oep oer oes oet om- oma omb omc ome omm omo omp omr oms omt oo- ooa oob ooc oom ooo oop oor oos oot op- opa opb opc ope opm opo opp opr ops opt or- ora orb orc ore orm oro orp orr ors ort os- osa osb osc ose osm oso osp osr oss ost ot- ota otb otc ote otm oto otp otr ots ott p-p paa pab pac pae pam pao pap par pas pat pba pbb pbc pbe pbm pbo pbp pbr pbs pbt pca pcb pcc pce pcm pco pcp pcr pcs pct pea peb pec pee pem peo pep per pes pet pma pmb pmc pme pmm pmo pmp pmr pms pmt poa pob poc poe pom poo pop por pos pot ppa ppb ppc ppe ppm ppo ppp ppr pps ppt pra prb prc pre prm pro prp prr prs prt ps- psa psb psc pse psm pso psp psr pss pst pt- pta ptb ptc pte ptm pto ptp ptr pts ptt ra- raa rab rac rae ram rao rap rar ras rat rba rbb rbc rbe rbm rbo rbp rbr rbs rbt rca rcb rcc rce rcm rco rcp rcr rcs rct re- rea reb rec ree rem reo rep rer res ret rma rmb rmc rme rmm rmo rmp rmr rms rmt roa rob roc roe rom roo rop ror ros rot rpa rpb rpc rpe rpm rpo rpp rpr rps rpt rra rrb rrc rrm rrp rrr rrs rrt rsa rsb rsc rse rsm rso rsp rsr rss rst rta rtb rtc rte rtm rto rtp rtr rts rtt saa sab sac sae sam sao sap sar sas sat sba sbb sbc sbe sbm sbo sbp sbr sbs sbt sca scb scc sce scm sco scp scr scs sct se- sea seb sec see sem seo sep ser ses set sma smb smc sme smm smo smp smr sms smt soa sob soc soe som soo sop sor sos sot spa spb spc spe spm spo spp spr sps spt sr- sra srb src sre srm sro srp srr srs srt ss- ssa ssb ssc sse ssm sso ssp ssr sss sst sta stb stc ste stm sto stp str sts stt taa tab tac tae tam tao tap tar tas tat tba tbb tbc tbe tbm tbo tbp tbr tbs tbt tca tcb tcc tce tcm tco tcp tcr tcs tct te- tea teb tec tee tem teo tep ter tes tet tma tmb tmc tme tmm tmo tmp tmr tms tmt to- toa tob toc toe tom too top tor tos tot tpa tpb tpc tpe