a-a a-b aaa aab aae aah aas ab- aba abb abe abh abs aea aeb aee aeh aes aha ahb ahe ahh ahs as- asa asb ase ash ass baa bab bae bah bas bba bbb bbe bbh bbs be- bea beb bee beh bes bha bhb bhe bhh bhs bsa bsb bse bsh bss eaa eab eae eah eas eba ebb ebe ebh ebs eea eeb eee ees eha ehb ehe ehh ehs es- esa esb ese esh ess haa hab hae hah has hba hbb hbe hbh hbs he- hea heb hee heh hes hha hhb hhe hhh hhs hsa hsb hse hsh hss saa sab sae sah sas sba sbb sbe sbh sbs se- sea seb see seh ses sh- sha shb she shh shs ss- ssa ssb sse ssh sss