a-a a-c aaa aac aae aaf aah aao aas ac- aca acc ace acf ach aco acs aea aec aee aef aeh aeo aes af- afa afc afe aff afh afo afs aha ahc ahe ahf ahh aho ahs aoa aoc aoe aof aoh aoo aos as- asa asc ase asf ash aso ass c-- caa cac cae caf cah cao cas cca ccc cce ccf cch cco ccs ce- cea cec cee cef ceh ceo ces cfa cfc cfe cff cfh cfo cfs ch- cha chc che chf chh cho chs co- coa coc coe cof coh coo cos csa csc cse csf csh cso css eaa eac eae eaf eah eao eas ec- eca ecc ece ecf ech eco ecs eea eec eee eef eeo ees ef- efa efc efe eff efh efo efs eha ehc ehe ehf ehh eho ehs eo- eoa eoc eoe eof eoh eoo eos es- esa esc ese esf esh eso ess faa fac fae faf fah fao fas fca fcc fce fcf fco fcs fea fec fee fef feh feo fes ffa ffc ffe fff ffh ffo ffs fha fhc fhe fhf fhh fho fhs foa foc foe fof foh foo fos fsa fsc fse fsf fsh fso fss haa hac hae haf hah hao has hca hcc hce hcf hch hco hcs he- hea hec hee hef heh heo hes hfa hfc hfe hff hfh hfo hfs hha hhc hhe hhf hhh hho hhs hoa hoc hoe hof hoh hoo hos hsa hsc hse hsf hsh hss oaa oac oae oaf oah oao oas oc- oca occ ocf och oco ocs oea oec oee oef oeh oeo oes of- ofa ofc ofe off ofo ofs oha ohc ohe ohf ohh oho ohs oo- ooa ooc oof ooh ooo oos os- osa osc ose osf osh oso oss saa sac sae saf sah sao sas sca scc sce scf sch sco scs se- sea sec see sef seh seo ses sfa sfc sfe sff sfh sfo sfs sh- sha shc she shf shh sho shs soa soc soe sof soh soo sos ss- ssa ssc sse ssf ssh sso sss