-al a-a a-c aaa aac aae aaf aal aas ac- aca acc ace acf acl acs aea aec aee aef ael aes af- afa afc afe aff afl afs al- ala alc ale alf all als as- asa asc ase asf asl ass c-- caa cac cae caf cal cas cca ccc cce ccf ccl ccs ce- cea cec cee cef cel ces cfa cfc cfe cff cfl cfs cl- cla clc cle clf cll cls csa csc cse csf csl css eaa eac eae eaf eal eas ec- eca ecc ece ecf ecl ecs eea eec eee eef eel ees ef- efa efc efe eff efl efs ela elc ele elf ell els es- esa esc ese esf esl ess faa fac fae faf fal fas fca fcc fce fcf fcl fcs fea fec fee fef fel fes ffa ffc ffe fff ffl ffs fla flc fle flf fll fls fsa fsc fse fsf fsl fss la- laa lac lae laf lal las lca lcc lce lcf lcl lcs lea lec lee lef lel les lfa lfc lfe lff lfl lfs lla llc lle llf lll lls lsa lsc lse lsf lsl lss saa sac sae saf sal sas sca scc sce scf scl scs se- sea sec see sef sel ses sfa sfc sfe sff sfl sfs sla slc sle slf sll sls ss- ssa ssc sse ssf ssl sss