a-a a-b a-z aaa aab aad aak aao aas aaz ab- aba abb abd abk abo abs abz ad- ada adb add adk ado ads adz aka akb akd akk ako aks aoa aob aod aok aoo aos as- asa asb asd ask aso ass asz az- aza azb azd azo azs azz baa bab bad bak bao bas baz bba bbb bbd bbk bbo bbs bda bdb bdd bdk bdo bds bdz bka bkb bkk bko bks boa bob bod bok boo bos boz bsa bsb bsd bsk bso bss bza bzd bzo bzs bzz daa dab dad dak dao das daz dba dbb dbd dbk dbo dbs dbz dda ddb ddd ddk ddo dds ddz dka dkb dkk dko dks doa dob dod dok doo dos doz dsa dsb dsd dsk dso dss dsz dza dzb dzd dzo dzs k-z ka- kaa kab kad kak kao kas kaz kba kbb kbd kbk kbo kbs kbz kda kdb kdk kdo kds kkb kkk kks koa kob kod kok koo kos koz ksa ksb ksd ksk kso kss kzo oaa oab oad oak oao oas ob- oba obb obd obk obo obs oda odb odd odo ods oka okb okd okk oko oks oo- ooa oob ood ook ooo oos os- osa osb osd osk oso oss oza ozo ozs ozz saa sab sad sak sao sas saz sba sbb sbd sbk sbo sbs sda sdb sdd sdk sdo sds sdz sk- ska skb skd skk sko sks soa sob sod sok soo sos soz ss- ssa ssb ssd ssk sso sss ssz sza szd zaa zab zad zak zao zas zaz zbb zbs zds zka zks zo- zoa zob zod zok zoo zos zsa zsz zzs zzz