-er a-a a-b a-i a-t aaa aab aae aag aai aan aap aar aas aat ab- aba abb abe abg abi abn abp abr abs abt aea aeb aee aeg aei aen aep aer aes aet ag- aga agb age agg agi agn agp agr ags agt ai- aia aib aie aig aii ain aip air ais ait an- ana anb ane ang ani ann anp anr ans ant ap- apa apb ape apg api apn app apr aps apt ar- ara arb are arg ari arn arp arr ars art as- asa asb ase asg asi asn asp asr ass ast at- ata atb ate atg ati atn atp atr ats att b-p baa bab bae bag bai ban bap bar bas bat bba bbb bbe bbg bbi bbn bbp bbr bbs bbt be- bea beb bee beg bei ben bep ber bes bet bga bgb bge bgg bgi bgn bgp bgr bgs bgt bi- bia bib bie big bii bin bip bir bis bit bna bnb bne bng bni bnn bnp bnr bns bnt bpa bpb bpe bpg bpi bpn bpp bpr bps bpt bra brb bre brg bri brn brp brr brs brt bsa bsb bse bsg bsi bsn bsp bsr bss bst bta btb bte btg bti btn btp btr bts btt eaa eab eae eag eai ean eap ear eas eat eba ebb ebe ebg ebi ebn ebp ebr ebs ebt eea eeb eee eeg een eep eer ees eet ega egb ege egg egi egn egp egr egs egt eia eib eie eig eii ein eip eir eis eit en- ena enb ene eng eni enn enp enr ens ent ep- epa epb epe epg epi epn epp epr eps ept era erb ere erg eri ern erp err ers ert es- esa esb ese esg esi esn esp esr ess est eta etb ete etg eti etn etp etr ets ett g-p gaa gab gae gag gai gan gap gar gas gat gba gbe gbg gbi gbn gbp gbr gbs gbt ge- gea geb gee geg gei gen gep ger ges get gga ggb ggg ggi ggn ggp ggr ggs ggt gia gib gie gig gii gin gip gir gis git gna gnb gne gni gnn gnp gnr gns gnt gpa gpb gpe gpg gpi gpn gpp gpr gps gpt gra grb gre grg gri grn grp grr grs grt gsa gsb gse gsg gsi gsn gsp gsr gss gst gta gtb gte gtg gti gtn gtp gtr gts gtt ia- iaa iab iae iag iai ian iap iar ias iat iba ibb ibe ibg ibi ibn ibp ibr ibs ibt ie- iea iee ieg iei ien iep ier ies iet iga igb ige igg igi ign igp igr igs igt iia iib iie iii iin iip iir iis iit in- ina inb ine ing ini inn inp inr ins int ipa ipb ipe ipg ipi ipn ipp ipr ips ipt ir- ira irb ire irg iri irn irp irr irs irt is- isa isb ise isg isi isn isp isr iss ist ita itb ite itg iti itn itp its itt n-i naa nab nae nag nai nan nap nar nas nat nba nbb nbe nbg nbi nbn nbp nbr nbs nbt ne- nea neb nee neg nei nen nep ner nes net nga ngb nge ngg ngi ngn ngp ngs ngt nia nib nie nig nii nin nip nir nis nit nna nnb nne nng nni nnn nnp nns nnt npa npb npe npg npi npn npp npr nps npt nra nrb nre nrg nri nrn nrp nrr nrs nrt nsa nsb nse nsg nsi nsn nsp nsr nss nst nta ntb nte ntg nti ntn ntp ntr nts ntt p-p paa pab pae pag pai pan pap par pas pat pba pbb pbe pbg pbi pbn pbp pbr pbs pbt pea peb pee peg pei pen pep per pes pet pga pgb pge pgg pgi pgn pgp pgr pgs pgt pia pib pie pig pii pin pip pir pis pit pn- pna pnb pne png pni pnn pnp pnr pns pnt ppa ppb ppe ppg ppi ppn ppp ppr pps ppt pra prb pre prg pri prn prp prr prs prt ps- psa psb pse psg psi psn psp psr pss pst pt- pta ptb pte ptg pti ptn ptp ptr pts ptt ra- raa rab rae rag rai ran rap rar ras rat rba rbb rbe rbg rbi rbn rbp rbr rbs rbt re- rea reb ree reg rei ren rep rer res ret rga rgb rge rgg rgi rgn rgp rgr rgs rgt ria rib rie rig rii rin rip rir ris rit rna rnb rng rni rnn rnp rnr rns rnt rpa rpb rpe rpg rpi rpn rpp rpr rps rpt rra rrb rrg rri rrn rrp rrr rrs rrt rsa rsb rse rsg rsi rsn rsp rsr rss rst rta rtb rte rtg rti rtn rtp rtr rts rtt saa sab sae sag sai san sap sar sas sat sba sbb sbe sbg sbi sbn sbp sbr sbs sbt se- sea seb see seg sei sen sep ser ses set sga sgb sge sgg sgi sgn sgp sgr sgs sgt sia sib sie sig sii sin sip sir sis sit sna snb sne sng sni snn snp snr sns snt spa spb spe spg spi spn spp spr sps spt sr- sra srb sre srg sri srn srp srr srs srt ss- ssa ssb sse ssg ssi ssn ssp ssr sss sst sta stb ste stg sti stn stp str sts stt taa tab tae tag tai tan tap tar tas tat tba tbb tbe tbg tbi tbn tbp tbr tbs tbt te- tea teb tee teg tei ten tep ter tes tet tga tgb tge tgg tgi tgn tgp tgr tgs tgt tia tib tie tig tii tin tip tir tis tit tna tnb tne tng tni tnn tnp tnr tns tnt tpa tpb tpe tpg tpi tpn tpp tpr tps tpt tra trb tre