a-a a-b a-i a-z aaa aab aad aai aak aao aar aaz ab- aba abb abd abi abk abo abr abz ad- ada adb add adi adk ado adr adz ai- aia aib aid aii aik aio air aiz aka akb akd aki akk ako akr aoa aob aod aoi aok aoo aor ar- ara arb ard ari ark aro arr arz az- aza azb azd azi azo azz baa bab bad bai bak bao bar baz bba bbb bbd bbi bbk bbo bbr bda bdb bdd bdi bdk bdo bdr bdz bi- bia bib bid bii bik bio bir biz bka bkb bkk bko bkr boa bob bod boi bok boo bor boz bra brb brd bri brk bro brr brz bza bzd bzo bzr bzz daa dab dad dai dak dao dar daz dba dbb dbd dbi dbk dbo dbr dbz dda ddb ddd ddi ddk ddo ddr ddz di- dia dib did dii dik dio dir diz dka dkb dki dkk dko dkr doa dob dod doi dok doo dor doz dra drb drd dri drk dro drr drz dza dzb dzd dzi dzo dzr i-d ia- iaa iab iad iai iao iar iaz iba ibb ibd ibi ibk ibo ibr ibz ida idb idd idi idk ido idr iia iib iid iii iio iir ika ikb iki ikk iko ikr io- ioa iob iod ioi ioo ior ir- ira irb ird iri irk iro irr iza izi izo izz k-z ka- kaa kab kad kai kak kao kar kaz kba kbb kbd kbi kbk kbo kbr kbz kda kdb kdk kdo kdr kia kib kid kii kik kio kir kiz kkb kki kkk kkr koa kob kod koi kok koo kor koz kra krd kri krk kro krr kzo o-i oaa oab oad oai oak oao oar ob- oba obb obd obi obk obo obr oda odb odd odi odo odr oia oib oid oii oik oio oir oiz oka okb okd oki okk oko okr oo- ooa oob ood ooi ook ooo oor or- ora orb ord ori ork oro orr orz oza ozo ozz ra- raa rab rad rai rak rao rar raz rba rbb rbd rbi rbk rbo rbr rda rdb rdd rdi rdo rdr ria rib rid rii rik rio rir riz rkb rkk rko rkz roa rob rod roi rok roo ror roz rra rrb rrd rri rrk rrr rza rzb rzo zaa zab zad zai zak zao zar zaz zbb zbr zia zib zid zik zio zir ziz zka zo- zoa zob zod zoi zok zoo zor zro zzr zzz