-er a-a a-b a-i a-t aaa aab aae aag aai aao aap aar aas aat ab- aba abb abe abg abi abo abp abr abs abt aea aeb aee aeg aei aeo aep aer aes aet ag- aga agb age agg agi ago agp agr ags agt ai- aia aib aie aig aii aio aip air ais ait aoa aob aoe aog aoi aoo aop aor aos aot ap- apa apb ape apg api apo app apr aps apt ar- ara arb are arg ari aro arp arr ars art as- asa asb ase asg asi aso asp asr ass ast at- ata atb ate atg ati ato atp atr ats att b-p baa bab bae bag bai bao bap bar bas bat bba bbb bbe bbg bbi bbo bbp bbr bbs bbt be- bea beb bee beg bei beo bep ber bes bet bga bgb bge bgg bgi bgo bgp bgr bgs bgt bi- bia bib bie big bii bio bip bir bis bit boa bob boe bog boi boo bop bor bos bot bpa bpb bpe bpg bpi bpo bpp bpr bps bpt bra brb bre brg bri bro brp brr brs brt bsa bsb bse bsg bsi bso bsp bsr bss bst bta btb bte btg bti bto btp btr bts btt eaa eab eae eag eai eao eap ear eas eat eba ebb ebe ebg ebi ebo ebp ebr ebs ebt eea eeb eee eeg eeo eep eer ees eet ega egb ege egg egi ego egp egr egs egt eia eib eie eig eii eio eip eir eis eit eo- eoa eob eoe eog eoi eoo eop eor eos eot ep- epa epb epe epg epi epo epp epr eps ept era erb ere erg eri ero erp err ers ert es- esa esb ese esg esi eso esp esr ess est eta etb ete etg eti eto etp etr ets ett g-p gaa gab gae gag gai gao gap gar gas gat gba gbe gbg gbi gbo gbp gbr gbs gbt ge- gea geb gee geg gei geo gep ger ges get gga ggb ggg ggi ggo ggp ggr ggs ggt gia gib gie gig gii gio gip gir gis git goa gob goe gog goi goo gop gor gos got gpa gpb gpe gpg gpi gpo gpp gpr gps gpt gra grb gre grg gri gro grp grr grs grt gsa gsb gse gsg gsi gso gsp gsr gss gst gta gtb gte gtg gti gto gtp gtr gts gtt ia- iaa iab iae iag iai iao iap iar ias iat iba ibb ibe ibg ibi ibo ibp ibr ibs ibt ie- iea iee ieg iei iep ier ies iet iga igb ige igg igi igo igp igr igs igt iia iib iie iii iio iip iir iis iit io- ioa iob ioe iog ioi ioo iop ior ios iot ipa ipb ipe ipg ipi ipo ipp ipr ips ipt ir- ira irb ire irg iri iro irp irr irs irt is- isa isb ise isg isi iso isp isr iss ist ita itb ite itg iti ito itp its itt o-i oaa oab oae oag oai oao oap oar oas oat ob- oba obb obe obg obi obo obp obr obs obt oea oeb oee oeg oei oeo oep oer oes oet oga oge ogg ogi ogo ogp ogs ogt oia oib oie oii oio oip oir ois oit oo- ooa oob oog ooi ooo oop oor oos oot op- opa opb ope opg opi opo opp opr ops opt or- ora orb ore org ori oro orp orr ors ort os- osa osb ose osg osi oso osp osr oss ost ot- ota otb ote otg oti oto otp otr ots ott p-p paa pab pae pag pai pao pap par pas pat pba pbb pbe pbg pbi pbo pbp pbr pbs pbt pea peb pee peg pei peo pep per pes pet pga pgb pge pgg pgi pgo pgp pgr pgs pgt pia pib pie pig pii pio pip pir pis pit poa pob poe pog poi poo pop por pos pot ppa ppb ppe ppg ppi ppo ppp ppr pps ppt pra prb pre prg pri pro prp prr prs prt ps- psa psb pse psg psi pso psp psr pss pst pt- pta ptb pte ptg pti pto ptp ptr pts ptt ra- raa rab rae rag rai rao rap rar ras rat rba rbb rbe rbg rbi rbo rbp rbr rbs rbt re- rea reb ree reg rei reo rep rer res ret rga rgb rge rgg rgi rgo rgp rgr rgs rgt ria rib rie rig rii rio rip rir ris rit roa rob roe rog roi roo rop ror ros rot rpa rpb rpe rpg rpi rpo rpp rpr rps rpt rra rrb rrg rri rrp rrr rrs rrt rsa rsb rse rsg rsi rso rsp rsr rss rst rta rtb rte rtg rti rto rtp rtr rts rtt saa sab sae sag sai sao sap sar sas sat sba sbb sbe sbg sbi sbo sbp sbr sbs sbt se- sea seb see seg sei seo sep ser ses set sga sgb sge sgg sgi sgo sgp sgr sgs sgt sia sib sie sig sii sio sip sir sis sit soa sob soe sog soi soo sop sor sos sot spa spb spe spg spi spo spp spr sps spt sr- sra srb sre srg sri sro srp srr srs srt ss- ssa ssb sse ssg ssi sso ssp ssr sss sst sta stb ste stg sti sto stp str sts stt taa tab tae tag tai tao tap tar tas tat tba tbb tbe tbg tbi tbo tbp tbr tbs tbt te- tea teb tee teg tei teo tep ter tes tet tga tgb tge tgg tgi tgo tgp tgr tgs tgt tia tib tie tig tii tio tip tir tis tit to- toa tob toe tog toi too top tor tos tot tpa tpb tpe tpg tpi tpo tpp tpr tps tpt tra