-er a-a a-b a-i a-t aaa aab aad aae aai aan aap aar aas aat ab- aba abb abd abe abi abn abp abr abs abt ad- ada adb add ade adi adn adp adr ads adt aea aeb aed aee aei aen aep aer aes aet ai- aia aib aid aie aii ain aip air ais ait an- ana anb and ane ani ann anp anr ans ant ap- apa apb apd ape api apn app apr aps apt ar- ara arb ard are ari arn arp arr ars art as- asa asb asd ase asi asn asp asr ass ast at- ata atb atd ate ati atn atp atr ats att b-p baa bab bad bae bai ban bap bar bas bat bba bbb bbd bbe bbi bbn bbp bbr bbs bbt bda bdb bdd bde bdi bdp bdr bds bdt be- bea beb bed bee bei ben bep ber bes bet bi- bia bib bid bie bii bin bip bir bis bit bna bnb bnd bne bni bnn bnp bnr bns bnt bpa bpb bpd bpe bpi bpn bpp bpr bps bpt bra brb brd bre bri brn brp brr brs brt bsa bsb bsd bse bsi bsn bsp bsr bss bst bta btb btd bte bti btn btp btr bts btt daa dab dad dae dai dan dap dar das dat dba dbb dbd dbe dbi dbn dbp dbr dbs dbt dda ddb ddd dde ddi ddn ddp ddr dds ddt de- dea deb ded dee dei den dep der des det di- dia dib did die dii din dip dir dis dit dna dnb dnd dne dni dnn dnp dnr dns dnt dpa dpb dpd dpe dpi dpn dpp dpr dps dpt dra drb drd dre dri drn drp drr drs drt dsa dsb dsd dse dsi dsn dsp dsr dss dst dta dtb dtd dte dti dtn dtp dtr dts dtt eaa eab ead eae eai ean eap ear eas eat eba ebb ebd ebe ebi ebn ebp ebr ebs ebt ed- eda edb edd ede edi edn edp edr eds edt eea eeb eed eee een eep eer ees eet eia eib eid eie eii ein eip eir eis eit en- ena enb end ene eni enn enp enr ens ent ep- epa epb epd epe epi epn epp epr eps ept era erb erd ere eri ern erp err ers ert es- esa esb esd ese esi esn esp esr ess est eta etb etd ete eti etn etp etr ets ett i-d ia- iaa iab iad iae iai ian iap iar ias iat iba ibb ibd ibe ibi ibn ibp ibr ibs ibt ida idb idd ide idi idn idp idr ids idt ie- iea ied iee iei ien iep ier ies iet iia iib iid iie iii iin iip iir iis iit in- ina inb ind ine ini inn inp inr ins int ipa ipb ipd ipe ipi ipn ipp ipr ips ipt ir- ira irb ird ire iri irn irp irr irs irt is- isa isb isd ise isi isn isp isr iss ist ita itb itd ite iti itn itp its itt n-i naa nab nad nae nai nan nap nar nas nat nba nbb nbd nbe nbi nbn nbp nbr nbs nbt nda ndb ndd nde ndi ndn ndp ndr nds ndt ne- nea neb ned nee nei nen nep ner nes net nia nib nid nie nii nin nip nir nis nit nna nnb nne nni nnn nnp nns nnt npa npb npd npe npi npn npp npr nps npt nra nrb nrd nre nri nrn nrp nrr nrs nrt nsa nsb nsd nse nsi nsn nsp nsr nss nst nta ntb ntd nte nti ntn ntp ntr nts ntt p-p paa pab pad pae pai pan pap par pas pat pba pbb pbd pbe pbi pbn pbp pbr pbs pbt pda pdb pdd pde pdi pdn pdp pdr pds pdt pea peb ped pee pei pen pep per pes pet pia pib pid pie pii pin pip pir pis pit pn- pna pnb pnd pne pni pnn pnp pnr pns pnt ppa ppb ppd ppe ppi ppn ppp ppr pps ppt pra prb prd pre pri prn prp prr prs prt ps- psa psb psd pse psi psn psp psr pss pst pt- pta ptb ptd pte pti ptn ptp ptr pts ptt ra- raa rab rad rae rai ran rap rar ras rat rba rbb rbd rbe rbi rbn rbp rbr rbs rbt rda rdb rdd rde rdi rdn rdp rdr rds rdt re- rea reb red ree rei ren rep rer res ret ria rib rid rie rii rin rip rir ris rit rna rnb rnd rni rnn rnp rnr rns rnt rpa rpb rpd rpe rpi rpn rpp rpr rps rpt rra rrb rrd rri rrn rrp rrr rrs rrt rsa rsb rsd rse rsi rsn rsp rsr rss rst rta rtb rtd rte rti rtn rtp rtr rts rtt saa sab sad sae sai san sap sar sas sat sba sbb sbd sbe sbi sbn sbp sbr sbs sbt sda sdb sdd sde sdi sdn sdp sdr sds sdt se- sea seb sed see sei sen sep ser ses set sia sib sid sie sii sin sip sir sis sit sna snb snd sne sni snn snp snr sns snt spa spb spd spe spi spn spp spr sps spt sr- sra srb srd sre sri srn srp srr srs srt ss- ssa ssb ssd sse ssi ssn ssp ssr sss sst sta stb std ste sti stn stp str sts stt taa tab tad tae tai tan tap tar tas tat tba tbb tbd tbe tbi tbn tbp tbr tbs tbt tda tdb tdd tde tdi tdn tdp tdr tds tdt te- tea teb ted tee tei ten tep ter tes tet tia tib tid tie tii tin tip tir tis tit tna tnb tnd tne tni tnn tnp tnr tns tnt tpa tpb tpd tpe tpi tpn tpp tpr