-al -er a-a a-c aaa aac aae aaf aak aal aar aas ac- aca acc ace acf ack acl acr acs aea aec aee aef aek ael aer aes af- afa afc afe aff afk afl afr afs aka akc ake akk akl akr aks al- ala alc ale alf alk all alr als ar- ara arc are arf ark arl arr ars as- asa asc ase asf ask asl asr ass c-- caa cac cae caf cak cal car cas cca ccc cce ccf cck ccl ccr ccs ce- cea cec cee cef cek cel cer ces cfa cfc cfe cff cfk cfl cfr cfs cka ckc cks cl- cla clc cle clf clk cll clr cls cra crc cre crf crk crl crr crs csa csc cse csf csk csl csr css eaa eac eae eaf eak eal ear eas ec- eca ecc ece ecf eck ecl ecr ecs eea eec eee eef eek eel eer ees ef- efa efc efe eff efl efr efs eka ekc eke ekf ekl ekr eks ela elc ele elf elk ell elr els era erc ere erf erk erl err ers es- esa esc ese esf esk esl esr ess faa fac fae faf fak fal far fas fca fcc fce fcf fck fcl fcr fcs fea fec fee fef fek fel fer fes ffa ffc ffe fff ffk ffl ffr ffs fka fkc fkf fkk fkl fla flc fle flf fll flr fls fra frc fre frf frk frl frr frs fsa fsc fse fsf fsk fsl fsr fss ka- kaa kac kae kaf kak kal kar kas kca kcc kce kck kcl kcr kcs ke- kea kec kee kef kek kel ker kes kfa kfc kff kfs kkc kke kkk kkl kkr kks kl- kla klc klf klr kls kra krc krf krk krl krr krs ksa ksc kse ksf ksk ksl ksr kss la- laa lac lae laf lak lal lar las lca lcc lce lcf lck lcl lcr lcs lea lec lee lef lek lel ler les lfa lfc lfe lff lfk lfl lfr lfs lka lkl lkr lks lla llc lle llf llk lll llr lls lra lrc lrf lrk lrr lrs lsa lsc lse lsf lsk lsl lsr lss ra- raa rac rae raf rak ral rar ras rca rcc rce rcf rcl rcr rcs re- rea rec ree ref rek rel rer res rfa rfc rfe rff rfk rfl rfr rfs rkc rke rkf rkk rks rla rlc rle rlf rll rlr rls rra rrc rrf rrk rrl rrr rrs rsa rsc rse rsf rsk rsl rsr rss saa sac sae saf sak sal sar sas sca scc sce scf sck scl scr scs se- sea sec see sef sek sel ser ses sfa sfc sfe sff sfk sfl sfr sfs sk- ska skc ske skf skk skl skr sks sla slc sle slf slk sll slr sls sr- sra src sre srf srk srl srr srs ss- ssa ssc sse ssf ssk ssl ssr sss