-al -er -ic a-a a-c a-i aaa aac aae aag aai aal aar aax ac- aca acc ace acg aci acl acr acx aea aec aee aeg aei ael aer aex ag- aga agc age agg agi agl agr agx ai- aia aic aie aig aii ail air aix al- ala alc ale alg ali all alr alx ar- ara arc are arg ari arl arr arx ax- axa axe axi axl axr axx c-- caa cac cae cag cai cal car cax cca ccc cce ccg cci ccl ccr ccx ce- cea cec cee ceg cei cel cer cex cga cgc cge cgg cgi cgl cgr ci- cia cic cie cig cii cil cir cix cl- cla clc cle clg cli cll clr clx cra crc cre crg cri crl crr crx cxc cxi cxl cxr cxx eaa eac eae eag eai eal ear eax ec- eca ecc ece ecg eci ecl ecr ecx eea eec eee eeg eel eer eex ega egc ege egg egi egl egr egx eia eic eie eig eii eil eir eix ela elc ele elg eli ell elr elx era erc ere erg eri erl err ex- exa exc exe exi exl exr exx gaa gac gae gag gai gal gar gca gcc gce gcg gci gcl gcr ge- gea gec gee geg gei gel ger gex gga ggc ggg ggi ggr gia gic gie gig gii gil gir gla glc gle glg gli gll glr glx gra grc gre grg gri grl grr grx gxa gxl ia- iaa iac iae iag iai ial iar ica icc ice icg ici icl icr ie- iea iec iee ieg iei iel ier iex iga igc ige igg igi igl igr iia iic iie iii iil iir iix il- ila ilc ile ilg ili ill ilr ilx ir- ira irc ire irg iri irl irr irx ixc ixe ixi ixl la- laa lac lae lag lai lal lar lax lca lcc lce lcg lci lcl lcr lcx lea lec lee leg lei lel ler lex lga lgc lge lgg lgi lgl lgr lia lic lie lig lii lil lir lix lla llc lle llg lli lll llr lra lrc lrg lri lrr lxc lxi lxr lxx ra- raa rac rae rag rai ral rar rax rca rcc rce rcg rci rcl rcr rcx re- rea rec ree reg rei rel rer rex rga rgc rge rgg rgi rgr rgx ria ric rie rig rii ril rir rix rla rlc rle rlg rli rll rlr rra rrc rrg rri rrl rrr rxr xaa xac xag xal xar xci xcl xcr xcx xee xeg xel xer xex xge xgi xgl xia xic xie xii xix xla xlg xli xlr xrc xrx xxi xxl xxx