a-a a-b a-i a-z aaa aab aai aak aar aaz ab- aba abb abi abk abr abz ai- aia aib aii aik air aiz aka akb aki akk akr ar- ara arb ari ark arr arz az- aza azb azi azz baa bab bai bak bar baz bba bbb bbi bbk bbr bi- bia bib bii bik bir biz bka bkb bkk bkr bra brb bri brk brr brz bza bzr bzz ia- iaa iab iai iar iaz iba ibb ibi ibk ibr ibz iia iib iii iir ika ikb iki ikk ikr ir- ira irb iri irk irr iza izi izz k-z ka- kaa kab kai kak kar kaz kba kbb kbi kbk kbr kbz kia kib kii kik kir kiz kkb kki kkk kkr kra kri krk krr ra- raa rab rai rak rar raz rba rbb rbi rbk rbr ria rib rii rik rir riz rkb rkk rkz rra rrb rri rrk rrr rza rzb zaa zab zai zak zar zaz zbb zbr zia zib zik zir ziz zka zzr zzz