-al -er -ic a-a a-c a-i a-t aaa aac aae aag aai aal aar aat aax ac- aca acc ace acg aci acl acr act acx aea aec aee aeg aei ael aer aet aex ag- aga agc age agg agi agl agr agt agx ai- aia aic aie aig aii ail air ait aix al- ala alc ale alg ali all alr alt alx ar- ara arc are arg ari arl arr art arx at- ata atc ate atg ati atl atr att atx ax- axa axe axi axl axr axt axx c-- caa cac cae cag cai cal car cat cax cca ccc cce ccg cci ccl ccr cct ccx ce- cea cec cee ceg cei cel cer cet cex cga cgc cge cgg cgi cgl cgr cgt ci- cia cic cie cig cii cil cir cit cix cl- cla clc cle clg cli cll clr clt clx cra crc cre crg cri crl crr crt crx cta ctc cte ctg cti ctl ctr ctt ctx cxc cxi cxl cxr cxt cxx eaa eac eae eag eai eal ear eat eax ec- eca ecc ece ecg eci ecl ecr ect ecx eea eec eee eeg eel eer eet eex ega egc ege egg egi egl egr egt egx eia eic eie eig eii eil eir eit eix ela elc ele elg eli ell elr elt elx era erc ere erg eri erl err ert eta etc ete etg eti etl etr ett etx ex- exa exc exe exi exl exr ext exx gaa gac gae gag gai gal gar gat gca gcc gce gcg gci gcl gcr gct ge- gea gec gee geg gei gel ger get gex gga ggc ggg ggi ggr ggt gia gic gie gig gii gil gir git gla glc gle glg gli gll glr glt glx gra grc gre grg gri grl grr grt grx gta gtc gte gtg gti gtl gtr gtt gtx gxa gxl gxt ia- iaa iac iae iag iai ial iar iat ica icc ice icg ici icl icr ict ie- iea iec iee ieg iei iel ier iet iex iga igc ige igg igi igl igr igt iia iic iie iii iil iir iit iix il- ila ilc ile ilg ili ill ilr ilt ilx ir- ira irc ire irg iri irl irr irt irx ita itc ite itg iti itl itt itx ixc ixe ixi ixl la- laa lac lae lag lai lal lar lat lax lca lcc lce lcg lci lcl lcr lct lcx lea lec lee leg lei lel ler let lex lga lgc lge lgg lgi lgl lgr lgt lia lic lie lig lii lil lir lit lix lla llc lle llg lli lll llr llt lra lrc lrg lri lrr lrt lta ltc lte ltg lti ltl ltr ltt ltx lxc lxi lxr lxx ra- raa rac rae rag rai ral rar rat rax rca rcc rce rcg rci rcl rcr rct rcx re- rea rec ree reg rei rel rer ret rex rga rgc rge rgg rgi rgr rgt rgx ria ric rie rig rii ril rir rit rix rla rlc rle rlg rli rll rlr rlt rra rrc rrg rri rrl rrr rrt rta rtc rte rtg rti rtl rtr rtt rtx rxr t-x taa tac tae tag tai tal tar tat tax tca tcc tce tcg tci tcl tcr tct tcx te- tea tec tee teg tei tel ter tet tex tga tgc tge tgg tgi tgl tgr tgt tia tic tie tig tii til tir tit tix tla tlc tle tlg tli tll tlr tlt tlx tra trc tre trg tri trl trr trt trx tta ttc tte ttg tti ttl ttr ttt ttx txe txi txl txt xaa xac xag xal xar xat xci xcl xcr xcx xee xeg xel xer xet xex xge xgi xgl xia xic xie xii xit xix xla xlg xli xlr xlt xrc xrt xrx xtc xti xtr xtx xxi xxl xxx