-al a-a a-c aaa aac aae aaf aak aal aas ac- aca acc ace acf ack acl acs aea aec aee aef aek ael aes af- afa afc afe aff afk afl afs aka akc ake akk akl aks al- ala alc ale alf alk all als as- asa asc ase asf ask asl ass c-- caa cac cae caf cak cal cas cca ccc cce ccf cck ccl ccs ce- cea cec cee cef cek cel ces cfa cfc cfe cff cfk cfl cfs cka ckc cks cl- cla clc cle clf clk cll cls csa csc cse csf csk csl css eaa eac eae eaf eak eal eas ec- eca ecc ece ecf eck ecl ecs eea eec eee eef eek eel ees ef- efa efc efe eff efl efs eka ekc eke ekf ekl eks ela elc ele elf elk ell els es- esa esc ese esf esk esl ess faa fac fae faf fak fal fas fca fcc fce fcf fck fcl fcs fea fec fee fef fek fel fes ffa ffc ffe fff ffk ffl ffs fka fkc fkf fkk fkl fla flc fle flf fll fls fsa fsc fse fsf fsk fsl fss ka- kaa kac kae kaf kak kal kas kca kcc kce kck kcl kcs ke- kea kec kee kef kek kel kes kfa kfc kff kfs kkc kke kkk kkl kks kl- kla klc klf kls ksa ksc kse ksf ksk ksl kss la- laa lac lae laf lak lal las lca lcc lce lcf lck lcl lcs lea lec lee lef lek lel les lfa lfc lfe lff lfk lfl lfs lka lkl lks lla llc lle llf llk lll lls lsa lsc lse lsf lsk lsl lss saa sac sae saf sak sal sas sca scc sce scf sck scl scs se- sea sec see sef sek sel ses sfa sfc sfe sff sfk sfl sfs sk- ska skc ske skf skk skl sks sla slc sle slf slk sll sls ss- ssa ssc sse ssf ssk ssl sss