a-a a-c aaa aac aae aaf aah aas ac- aca acc ace acf ach acs aea aec aee aef aeh aes af- afa afc afe aff afh afs aha ahc ahe ahf ahh ahs as- asa asc ase asf ash ass c-- caa cac cae caf cah cas cca ccc cce ccf cch ccs ce- cea cec cee cef ceh ces cfa cfc cfe cff cfh cfs ch- cha chc che chf chh chs csa csc cse csf csh css eaa eac eae eaf eah eas ec- eca ecc ece ecf ech ecs eea eec eee eef ees ef- efa efc efe eff efh efs eha ehc ehe ehf ehh ehs es- esa esc ese esf esh ess faa fac fae faf fah fas fca fcc fce fcf fcs fea fec fee fef feh fes ffa ffc ffe fff ffh ffs fha fhc fhe fhf fhh fhs fsa fsc fse fsf fsh fss haa hac hae haf hah has hca hcc hce hcf hch hcs he- hea hec hee hef heh hes hfa hfc hfe hff hfh hfs hha hhc hhe hhf hhh hhs hsa hsc hse hsf hsh hss saa sac sae saf sah sas sca scc sce scf sch scs se- sea sec see sef seh ses sfa sfc sfe sff sfh sfs sh- sha shc she shf shh shs ss- ssa ssc sse ssf ssh sss