-er a-a a-b a-t aaa aab aae aaj aan aao aar aas aat ab- aba abb abe abj abn abo abr abs abt aea aeb aee aej aen aeo aer aes aet aja ajb aje ajj ajn ajo ajr ajs ajt an- ana anb ane anj ann ano anr ans ant aoa aob aoe aoj aon aoo aor aos aot ar- ara arb are arj arn aro arr ars art as- asa asb ase asj asn aso asr ass ast at- ata atb ate atn ato atr ats att baa bab bae baj ban bao bar bas bat bba bbb bbe bbn bbo bbr bbs bbt be- bea beb bee ben beo ber bes bet bja bjj bjn bjr bjs bjt bna bnb bne bnj bnn bno bnr bns bnt boa bob boe boj bon boo bor bos bot bra brb bre brj brn bro brr brs brt bsa bsb bse bsj bsn bso bsr bss bst bta btb bte btn bto btr bts btt eaa eab eae eaj ean eao ear eas eat eba ebb ebe ebj ebn ebo ebr ebs ebt eea eeb eee een eeo eer ees eet eja ejo ejt en- ena enb ene enn eno enr ens ent eo- eoa eob eoe eon eoo eor eos eot era erb ere ern ero err ers ert es- esa esb ese esn eso esr ess est eta etb ete etj etn eto etr ets ett jaa jab jae jaj jan jao jar jas jat jba jbj jbo jbr jbs jbt jea jeb jee jej jen jeo jer jes jet jja jjb jjj jjr jjs jna jne jnj jnn jno jnr jns jnt joa job joe joj jon joo jor jos jot jra jrb jrn jro jrr jrs jrt jsa jsb jse jsj jsn jso jsr jss jst jta jtb jte jtn jtr jts jtt naa nab nae naj nan nao nar nas nat nba nbb nbe nbn nbo nbr nbs nbt ne- nea neb nee nej nen neo ner nes net nja nje njn njs nna nnb nne nnn nno nns nnt no- noa nob noe noj non noo nor nos not nra nrb nre nrj nrn nro nrr nrs nrt nsa nsb nse nsn nso nsr nss nst nta ntb nte ntn nto ntr nts ntt oaa oab oae oaj oan oao oar oas oat ob- oba obb obe obj obn obo obr obs obt oea oeb oee oen oeo oer oes oet oja ojb oje ojo ojs on- ona onb one onj onn ono onr ons ont oo- ooa oob oon ooo oor oos oot or- ora orb ore orn oro orr ors ort os- osa osb ose osj osn oso osr oss ost ot- ota otb ote otn oto otr ots ott ra- raa rab rae raj ran rao rar ras rat rba rbb rbe rbn rbo rbr rbs rbt re- rea reb ree ren reo rer res ret rja rjr rna rnb rnn rno rnr rns rnt roa rob roe roj ron roo ror ros rot rra rrb rrn rrr rrs rrt rsa rsb rse rsj rsn rso rsr rss rst rta rtb rte rtj rtn rto rtr rts rtt saa sab sae saj san sao sar sas sat sba sbb sbe sbj sbn sbo sbr sbs sbt se- sea seb see sej sen seo ser ses set sja sjb sje sjj sjr sjs sjt sna snb sne snj snn sno snr sns snt soa sob soe soj son soo sor sos sot sr- sra srb sre srj srn sro srr srs srt ss- ssa ssb sse ssj ssn sso ssr sss sst sta stb ste stj stn sto str sts stt taa tab tae taj tan tao tar tas tat tba tbb tbe tbj tbn tbo tbr tbs tbt te- tea teb tee tej ten teo ter tes tet tje tjo tjr tjs tna tnb tne tnn tno tnr tns tnt to- toa tob toe toj ton too tor tos tot tra trb tre trn tro trr trs trt tsa tsb tse tsj tsn tso tsr tss tst tta ttb tte ttn tto ttr tts ttt