-er a-a a-b a-c a-z aaa aab aac aae aah aar aaz ab- aba abb abc abe abh abr abz ac- aca acb acc ace ach acr acz aea aeb aec aee aeh aer aez aha ahb ahc ahe ahh ahr ahz ar- ara arb arc are arh arr arz az- aza azb aze azz baa bab bac bae bah bar baz bba bbb bbc bbe bbh bbr bca bcb bcc bce bch bcr bcz be- bea beb bec bee beh ber bez bha bhb bhc bhe bhh bhr bra brb bre brh brr brz bza bze bzh bzr bzz c-- caa cab cac cae cah car caz cba cbb cbc cbe cbh cbr cbz cca ccb ccc cce cch ccr ccz ce- cea ceb cec cee ceh cer cez ch- cha chb chc che chh chr chz cra crb crc cre crh crr crz cz- czc cze eaa eab eac eae eah ear eaz eba ebb ebc ebe ebh ebr ec- eca ecb ecc ece ech ecr eea eeb eec eee eer eha ehb ehc ehe ehh ehr era erb erc ere erh err erz eze ezh ezr ezz haa hab hac hae hah har haz hba hbb hbc hbe hbh hbr hbz hca hcb hcc hce hch hcr he- hea heb hec hee heh her hez hha hhb hhc hhe hhh hhr hhz hr- hra hrb hrc hre hrh hrr hrz hze ra- raa rab rac rae rah rar raz rba rbb rbc rbe rbh rbr rca rcb rcc rce rch rcr re- rea reb rec ree reh rer rez rh- rha rhb rhc rhe rhh rhr rra rrb rrc rrh rrr rza rzb rze zaa zab zac zah zar zaz zbb zbc zbr zce zea zeb zec zee zeh zer zez zha zhc zhe zhr zrh zzr zzz