-al -ic a-a a-c a-i a-t aaa aac aaf aag aai aal aar aas aat ac- aca acc acf acg aci acl acr acs act af- afa afc aff afg afi afl afr afs aft ag- aga agc agf agg agi agl agr ags agt ai- aia aic aif aig aii ail air ais ait al- ala alc alf alg ali all alr als alt ar- ara arc arf arg ari arl arr ars art as- asa asc asf asg asi asl asr ass ast at- ata atc atf atg ati atl atr ats att c-- caa cac caf cag cai cal car cas cat cca ccc ccf ccg cci ccl ccr ccs cct cfa cfc cff cfg cfi cfl cfr cfs cft cga cgc cgg cgi cgl cgr cgs cgt ci- cia cic cif cig cii cil cir cis cit cl- cla clc clf clg cli cll clr cls clt cra crc crf crg cri crl crr crs crt csa csc csf csg csi csl csr css cst cta ctc ctf ctg cti ctl ctr cts ctt faa fac faf fag fai fal far fas fat fca fcc fcf fcg fci fcl fcr fcs fct ffa ffc fff ffg ffi ffl ffr ffs fft fga fgc fgf fgg fgi fgl fgr fgs fgt fia fic fif fig fii fil fir fis fit fla flc flf flg fli fll flr fls flt fra frc frf frg fri frl frr frs frt fsa fsc fsf fsg fsi fsl fsr fss fst fta ftc ftf ftg fti ftl ftr fts ftt gaa gac gaf gag gai gal gar gas gat gca gcc gcf gcg gci gcl gcr gcs gct gfa gfc gff gfi gfl gfr gfs gft gga ggc ggg ggi ggr ggs ggt gia gic gif gig gii gil gir gis git gla glc glf glg gli gll glr gls glt gra grc grf grg gri grl grr grs grt gsa gsc gsf gsg gsi gsl gsr gss gst gta gtc gtf gtg gti gtl gtr gts gtt i-f ia- iaa iac iaf iag iai ial iar ias iat ica icc icf icg ici icl icr ics ict ifa ifc iff ifg ifi ifl ifr ifs ift iga igc igf igg igi igl igr igs igt iia iic iif iii iil iir iis iit il- ila ilc ilf ilg ili ill ilr ils ilt ir- ira irc irf irg iri irl irr irs irt is- isa isc isf isg isi isl isr iss ist ita itc itf itg iti itl its itt la- laa lac laf lag lai lal lar las lat lca lcc lcf lcg lci lcl lcr lcs lct lfa lfc lff lfg lfi lfl lfr lfs lft lga lgc lgf lgg lgi lgl lgr lgs lgt lia lic lif lig lii lil lir lis lit lla llc llf llg lli lll llr lls llt lra lrc lrf lrg lri lrr lrs lrt lsa lsc lsf lsg lsi lsl lsr lss lst lta ltc ltf ltg lti ltl ltr lts ltt ra- raa rac raf rag rai ral rar ras rat rca rcc rcf rcg rci rcl rcr rcs rct rfa rfc rff rfg rfi rfl rfr rfs rft rga rgc rgf rgg rgi rgr rgs rgt ria ric rif rig rii ril rir ris rit rla rlc rlf rlg rli rll rlr rls rlt rra rrc rrf rrg rri rrl rrr rrs rrt rsa rsc rsf rsg rsi rsl rsr rss rst rta rtc rtf rtg rti rtl rtr rts rtt saa sac saf sag sai sal sar sas sat sca scc scf scg sci scl scr scs sct sfa sfc sff sfg sfi sfl sfr sfs sft sga sgc sgf sgg sgi sgl sgr sgs sgt sia sic sif sig sii sil sir sis sit sla slc slf slg sli sll slr sls slt sr- sra src srf srg sri srl srr srs srt ss- ssa ssc ssf ssg ssi ssl ssr sss sst sta stc stf stg sti stl str sts stt taa tac taf tag tai tal tar tas tat tca tcc tcf tcg tci tcl tcr tcs tct tfa tfc tff tfg tfi tfl tfr tfs tft tga tgc tgf tgg tgi tgl tgr tgs tgt tia tic tif tig tii til tir tis tit tla tlc tlf tlg tli tll tlr tls tlt tra trc trf trg tri trl trr trs trt tsa tsc tsf tsg tsi tsl tsr tss tst tta ttc ttf ttg tti ttl ttr tts ttt