-er a-a a-b a-z aaa aab aae aah aar aaz ab- aba abb abe abh abr abz aea aeb aee aeh aer aez aha ahb ahe ahh ahr ahz ar- ara arb are arh arr arz az- aza azb aze azz baa bab bae bah bar baz bba bbb bbe bbh bbr be- bea beb bee beh ber bez bha bhb bhe bhh bhr bra brb bre brh brr brz bza bze bzh bzr bzz eaa eab eae eah ear eaz eba ebb ebe ebh ebr eea eeb eee eer eha ehb ehe ehh ehr era erb ere erh err erz eze ezh ezr ezz haa hab hae hah har haz hba hbb hbe hbh hbr hbz he- hea heb hee heh her hez hha hhb hhe hhh hhr hhz hr- hra hrb hre hrh hrr hrz hze ra- raa rab rae rah rar raz rba rbb rbe rbh rbr re- rea reb ree reh rer rez rh- rha rhb rhe rhh rhr rra rrb rrh rrr rza rzb rze zaa zab zah zar zaz zbb zbr zea zeb zee zeh zer zez zha zhe zhr zrh zzr zzz