a-a a-c aaa aac aae aah aao aas ac- aca acc ace ach aco acs aea aec aee aeh aeo aes aha ahc ahe ahh aho ahs aoa aoc aoe aoh aoo aos as- asa asc ase ash aso ass c-- caa cac cae cah cao cas cca ccc cce cch cco ccs ce- cea cec cee ceh ceo ces ch- cha chc che chh cho chs co- coa coc coe coh coo cos csa csc cse csh cso css eaa eac eae eah eao eas ec- eca ecc ece ech eco ecs eea eec eee eeo ees eha ehc ehe ehh eho ehs eo- eoa eoc eoe eoh eoo eos es- esa esc ese esh eso ess haa hac hae hah hao has hca hcc hce hch hco hcs he- hea hec hee heh heo hes hha hhc hhe hhh hho hhs hoa hoc hoe hoh hoo hos hsa hsc hse hsh hss oaa oac oae oah oao oas oc- oca occ och oco ocs oea oec oee oeh oeo oes oha ohc ohe ohh oho ohs oo- ooa ooc ooh ooo oos os- osa osc ose osh oso oss saa sac sae sah sao sas sca scc sce sch sco scs se- sea sec see seh seo ses sh- sha shc she shh sho shs soa soc soe soh soo sos ss- ssa ssc sse ssh sso sss