-er a-a a-b a-i a-t aaa aab aae aai aak aan aap aar aas aat ab- aba abb abe abi abk abn abp abr abs abt aea aeb aee aei aek aen aep aer aes aet ai- aia aib aie aii aik ain aip air ais ait aka akb ake aki akk akn akp akr aks an- ana anb ane ani ank ann anp anr ans ant ap- apa apb ape api apk apn app apr aps apt ar- ara arb are ari ark arn arp arr ars art as- asa asb ase asi ask asn asp asr ass ast at- ata atb ate ati atn atp atr ats att b-p baa bab bae bai bak ban bap bar bas bat bba bbb bbe bbi bbk bbn bbp bbr bbs bbt be- bea beb bee bei bek ben bep ber bes bet bi- bia bib bie bii bik bin bip bir bis bit bka bkb bke bkk bkn bkp bkr bks bkt bna bnb bne bni bnk bnn bnp bnr bns bnt bpa bpb bpe bpi bpn bpp bpr bps bpt bra brb bre bri brk brn brp brr brs brt bsa bsb bse bsi bsk bsn bsp bsr bss bst bta btb bte bti btk btn btp btr bts btt eaa eab eae eai eak ean eap ear eas eat eba ebb ebe ebi ebk ebn ebp ebr ebs ebt eea eeb eee eek een eep eer ees eet eia eib eie eii eik ein eip eir eis eit eka ekb eke eki ekp ekr eks ekt en- ena enb ene eni enk enn enp enr ens ent ep- epa epb epe epi epn epp epr eps ept era erb ere eri erk ern erp err ers ert es- esa esb ese esi esk esn esp esr ess est eta etb ete eti etk etn etp etr ets ett ia- iaa iab iae iai ian iap iar ias iat iba ibb ibe ibi ibk ibn ibp ibr ibs ibt ie- iea iee iei iek ien iep ier ies iet iia iib iie iii iin iip iir iis iit ika ikb ike iki ikk ikr iks ikt in- ina inb ine ini ink inn inp inr ins int ipa ipb ipe ipi ipn ipp ipr ips ipt ir- ira irb ire iri irk irn irp irr irs irt is- isa isb ise isi isk isn isp isr iss ist ita itb ite iti itk itn itp its itt k-t ka- kaa kab kae kai kak kan kap kar kas kat kba kbb kbe kbi kbk kbn kbp kbr kbs ke- kea keb kee kei kek ken kep ker kes ket kia kib kie kii kik kin kip kir kis kit kkb kke kki kkk kkn kkp kkr kks kkt kn- kna kne kni knk knn knp knr knt kpa kpe kpi kpk kpn kpp kpr kps kpt kra kri krk krn krp krr krs krt ksa ksb kse ksi ksk ksn ksp ksr kss kst kta ktb kte ktk ktn ktp ktr kts ktt n-i naa nab nae nai nak nan nap nar nas nat nba nbb nbe nbi nbk nbn nbp nbr nbs nbt ne- nea neb nee nei nek nen nep ner nes net nia nib nie nii nik nin nip nir nis nit nka nke nki nkk nkn nkp nkr nks nkt nna nnb nne nni nnk nnn nnp nns nnt npa npb npe npi npn npp npr nps npt nra nrb nre nri nrk nrn nrp nrr nrs nrt nsa nsb nse nsi nsk nsn nsp nsr nss nst nta ntb nte nti ntk ntn ntp ntr nts ntt p-p paa pab pae pai pak pan pap par pas pat pba pbb pbe pbi pbk pbn pbp pbr pbs pbt pea peb pee pei pek pen pep per pes pet pia pib pie pii pik pin pip pir pis pit pka pkb pke pki pkn pkp pkr pks pkt pn- pna pnb pne pni pnk pnn pnp pnr pns pnt ppa ppb ppe ppi ppk ppn ppp ppr pps ppt pra prb pre pri prk prn prp prr prs prt ps- psa psb pse psi psk psn psp psr pss pst pt- pta ptb pte pti ptk ptn ptp ptr pts ptt ra- raa rab rae rai rak ran rap rar ras rat rba rbb rbe rbi rbk rbn rbp rbr rbs rbt re- rea reb ree rei rek ren rep rer res ret ria rib rie rii rik rin rip rir ris rit rkb rke rkk rkp rks rkt rna rnb rni rnn rnp rnr rns rnt rpa rpb rpe rpi rpk rpn rpp rpr rps rpt rra rrb rri rrk rrn rrp rrr rrs rrt rsa rsb rse rsi rsk rsn rsp rsr rss rst rta rtb rte rti rtk rtn rtp rtr rts rtt saa sab sae sai sak san sap sar sas sat sba sbb sbe sbi sbk sbn sbp sbr sbs sbt se- sea seb see sei sek sen sep ser ses set sia sib sie sii sik sin sip sir sis sit sk- ska skb ske ski skk skp skr sks skt sna snb sne sni snk snn snp snr sns snt spa spb spe spi spk spn spp spr sps spt sr- sra srb sre sri srk srn srp srr srs srt ss- ssa ssb sse ssi ssk ssn ssp ssr sss sst sta stb ste sti stk stn stp str sts stt taa tab tae tai tak tan tap tar tas tat tba tbb tbe tbi tbk tbn tbp tbr tbs tbt te- tea teb tee tei tek ten tep ter tes tet tia tib tie tii tik tin tip tir tis tit tka tkb tke tkk tkp tkr tks tkt tna tnb tne tni tnk tnn tnp tnr tns tnt tpa tpb tpe tpi tpk tpn tpp tpr tps tpt tra trb tre tri trk trn trp trr trs trt tsa tsb tse tsi tsk tsn tsp tsr tss tst tta ttb tte tti ttk ttn ttp