a-a a-b a-i aaa aab aae aah aai aak aas ab- aba abb abe abh abi abk abs aea aeb aee aeh aei aek aes aha ahb ahe ahh ahi ahk ahs ai- aia aib aie aih aii aik ais aka akb ake akh aki akk aks as- asa asb ase ash asi ask ass baa bab bae bah bai bak bas bba bbb bbe bbh bbi bbk bbs be- bea beb bee beh bei bek bes bha bhb bhe bhh bhi bhk bhs bi- bia bib bie bih bii bik bis bka bkb bke bkk bks bsa bsb bse bsh bsi bsk bss eaa eab eae eah eai eak eas eba ebb ebe ebh ebi ebk ebs eea eeb eee eek ees eha ehb ehe ehh ehi ehs eia eib eie eii eik eis eka ekb eke ekh eki eks es- esa esb ese esh esi esk ess h-i haa hab hae hah hai hak has hba hbb hbe hbh hbi hbk hbs he- hea heb hee heh hei hek hes hha hhb hhe hhh hhi hhk hhs hia hib hie hih hii hik his hka hkb hkh hki hkk hks hsa hsb hse hsh hsi hsk hss ia- iaa iab iae iah iai ias iba ibb ibe ibh ibi ibk ibs ie- iea iee iei iek ies iha ihb ihe ihh ihi ihk ihs iia iib iie iih iii iis ika ikb ike iki ikk iks is- isa isb ise ish isi isk iss ka- kaa kab kae kah kai kak kas kba kbb kbe kbh kbi kbk kbs ke- kea keb kee keh kei kek kes kha khe khh khi khk khs kia kib kie kih kii kik kis kkb kke kkh kki kkk kks ksa ksb kse ksh ksi ksk kss saa sab sae sah sai sak sas sba sbb sbe sbh sbi sbk sbs se- sea seb see seh sei sek ses sh- sha shb she shh shi shk shs sia sib sie sih sii sik sis sk- ska skb ske skh ski skk sks ss- ssa ssb sse ssh ssi ssk sss