-al a-a a-b a-i a-t aaa aab aaf aag aai aal aan aar aas aat ab- aba abb abf abg abi abl abn abr abs abt af- afa afb aff afg afi afl afn afr afs aft ag- aga agb agf agg agi agl agn agr ags agt ai- aia aib aif aig aii ail ain air ais ait al- ala alb alf alg ali all aln alr als alt an- ana anb anf ang ani anl ann anr ans ant ar- ara arb arf arg ari arl arn arr ars art as- asa asb asf asg asi asl asn asr ass ast at- ata atb atf atg ati atl atn atr ats att baa bab baf bag bai bal ban bar bas bat bba bbb bbf bbg bbi bbl bbn bbr bbs bbt bfa bfb bff bfg bfi bfl bfn bfr bfs bft bga bgb bgf bgg bgi bgl bgn bgr bgs bgt bi- bia bib bif big bii bil bin bir bis bit bla blb blf blg bli bll bln blr bls blt bna bnb bnf bng bni bnl bnn bnr bns bnt bra brb brf brg bri brl brn brr brs brt bsa bsb bsf bsg bsi bsl bsn bsr bss bst bta btb btf btg bti btl btn btr bts btt faa fab faf fag fai fal fan far fas fat fba fbb fbf fbg fbi fbl fbn fbr fbs fbt ffa fff ffg ffi ffl ffn ffr ffs fft fga fgb fgf fgg fgi fgl fgn fgr fgs fgt fia fib fif fig fii fil fin fir fis fit fla flb flf flg fli fll fln flr fls flt fna fnb fnf fng fni fnl fnn fnr fns fnt fra frb frf frg fri frl frn frr frs frt fsa fsb fsf fsg fsi fsl fsn fsr fss fst fta ftb ftf ftg fti ftl ftn ftr fts ftt gaa gab gaf gag gai gal gan gar gas gat gba gbf gbg gbi gbl gbn gbr gbs gbt gfa gfb gff gfi gfl gfr gfs gft gga ggb ggg ggi ggn ggr ggs ggt gia gib gif gig gii gil gin gir gis git gla glb glf glg gli gll gln glr gls glt gna gnb gnf gni gnl gnn gnr gns gnt gra grb grf grg gri grl grn grr grs grt gsa gsb gsf gsg gsi gsl gsn gsr gss gst gta gtb gtf gtg gti gtl gtn gtr gts gtt i-f ia- iaa iab iaf iag iai ial ian iar ias iat iba ibb ibf ibg ibi ibl ibn ibr ibs ibt ifa ifb iff ifg ifi ifl ifn ifr ifs ift iga igb igf igg igi igl ign igr igs igt iia iib iif iii iil iin iir iis iit il- ila ilb ilf ilg ili ill iln ilr ils ilt in- ina inb inf ing ini inl inn inr ins int ir- ira irb irf irg iri irl irn irr irs irt is- isa isb isf isg isi isl isn isr iss ist ita itb itf itg iti itl itn its itt la- laa lab laf lag lai lal lan lar las lat lba lbb lbf lbg lbi lbl lbr lbs lbt lfa lfb lff lfg lfi lfl lfn lfr lfs lft lga lgb lgf lgg lgi lgl lgn lgr lgs lgt lia lib lif lig lii lil lin lir lis lit lla llb llf llg lli lll lln llr lls llt lna lnb lng lni lnl lnn lnr lns lnt lra lrb lrf lrg lri lrn lrr lrs lrt lsa lsb lsf lsg lsi lsl lsn lsr lss lst lta ltb ltf ltg lti ltl ltr lts ltt n-i naa nab naf nag nai nal nan nar nas nat nba nbb nbf nbg nbi nbl nbn nbr nbs nbt nfa nfb nff nfi nfl nfn nfr nfs nft nga ngb ngf ngg ngi ngl ngn ngs ngt nia nib nif nig nii nil nin nir nis nit nla nlb nlf nlg nli nll nln nlr nls nlt nna nnb nnf nng nni nnl nnn nns nnt nra nrb nrf nrg nri nrl nrn nrr nrs nrt nsa nsb nsf nsg nsi nsl nsn nsr nss nst nta ntb ntf ntg nti ntn ntr nts ntt ra- raa rab raf rag rai ral ran rar ras rat rba rbb rbf rbg rbi rbl rbn rbr rbs rbt rfa rfb rff rfg rfi rfl rfn rfr rfs rft rga rgb rgf rgg rgi rgn rgr rgs rgt ria rib rif rig rii ril rin rir ris rit rla rlf rlg rli rll rln rlr rls rlt rna rnb rng rni rnn rnr rns rnt rra rrb rrf rrg rri rrl rrn rrr rrs rrt rsa rsb rsf rsg rsi rsl rsn rsr rss rst rta rtb rtf rtg rti rtl rtn rtr rts rtt saa sab saf sag sai sal san sar sas sat sba sbb sbf sbg sbi sbl sbn sbr sbs sbt sfa sfb sff sfg sfi sfl sfn sfr sfs sft sga sgb sgf sgg sgi sgl sgn sgr sgs sgt sia sib sif sig sii sil sin sir sis sit sla slb slf slg sli sll sln slr sls slt sna snb snf sng sni snl snn snr sns snt sr- sra srb srf srg sri srl srn srr srs srt ss- ssa ssb ssf ssg ssi ssl ssn ssr sss sst sta stb stf stg sti stl stn str sts stt taa tab taf tag tai tal tan tar tas tat tba tbb tbf tbg tbi tbl tbn tbr tbs tbt tfa tfb tff tfg tfi tfl tfn tfr tfs tft tga tgb tgf tgg tgi tgl tgn tgr tgs tgt tia tib tif tig tii til tin tir tis tit tla tlf tlg tli tll tln tlr tls tlt tna tnb tnf tng tni tnl tnn tnr tns tnt tra trb trf trg tri trl trn trr trs trt tsa tsb tsf tsg tsi tsl tsn tsr tss tst tta ttb ttf ttg tti ttl