-al -er -ic a-a a-c a-i aaa aac aae aag aai aak aal aar ac- aca acc ace acg aci ack acl acr aea aec aee aeg aei aek ael aer ag- aga agc age agg agi agk agl agr ai- aia aic aie aig aii aik ail air aka akc ake akg aki akk akl akr al- ala alc ale alg ali alk all alr ar- ara arc are arg ari ark arl arr c-- caa cac cae cag cai cak cal car cca ccc cce ccg cci cck ccl ccr ce- cea cec cee ceg cei cek cel cer cga cgc cge cgg cgi cgl cgr ci- cia cic cie cig cii cik cil cir cka ckc cki cl- cla clc cle clg cli clk cll clr cra crc cre crg cri crk crl crr eaa eac eae eag eai eak eal ear ec- eca ecc ece ecg eci eck ecl ecr eea eec eee eeg eek eel eer ega egc ege egg egi egl egr eia eic eie eig eii eik eil eir eka ekc eke ekg eki ekl ekr ela elc ele elg eli elk ell elr era erc ere erg eri erk erl err gaa gac gae gag gai gak gal gar gca gcc gce gcg gci gck gcl gcr ge- gea gec gee geg gei gek gel ger gga ggc ggg ggi ggr gia gic gie gig gii gik gil gir gka gla glc gle glg gli glk gll glr gra grc gre grg gri grk grl grr ia- iaa iac iae iag iai ial iar ica icc ice icg ici ick icl icr ie- iea iec iee ieg iei iek iel ier iga igc ige igg igi igk igl igr iia iic iie iii iil iir ika ikc ike iki ikk ikl ikr il- ila ilc ile ilg ili ilk ill ilr ir- ira irc ire irg iri irk irl irr ka- kaa kac kae kag kai kak kal kar kca kcc kce kcg kci kck kcl kcr ke- kea kec kee keg kei kek kel ker kga kgc kgi kgl kia kic kie kig kii kik kil kir kkc kke kki kkk kkl kkr kl- kla klc klg kli klr kra krc krg kri krk krl krr la- laa lac lae lag lai lak lal lar lca lcc lce lcg lci lck lcl lcr lea lec lee leg lei lek lel ler lga lgc lge lgg lgi lgk lgl lgr lia lic lie lig lii lik lil lir lka lkg lkl lkr lla llc lle llg lli llk lll llr lra lrc lrg lri lrk lrr ra- raa rac rae rag rai rak ral rar rca rcc rce rcg rci rcl rcr re- rea rec ree reg rei rek rel rer rga rgc rge rgg rgi rgk rgr ria ric rie rig rii rik ril rir rkc rke rkg rkk rla rlc rle rlg rli rll rlr rra rrc rrg rri rrk rrl rrr