a-a a-b a-i a-z aaa aab aai aak aas aaz ab- aba abb abi abk abs abz ai- aia aib aii aik ais aiz aka akb aki akk aks as- asa asb asi ask ass asz az- aza azb azi azs azz baa bab bai bak bas baz bba bbb bbi bbk bbs bi- bia bib bii bik bis biz bka bkb bkk bks bsa bsb bsi bsk bss bza bzs bzz ia- iaa iab iai ias iaz iba ibb ibi ibk ibs ibz iia iib iii iis ika ikb iki ikk iks is- isa isb isi isk iss iza izi izz k-z ka- kaa kab kai kak kas kaz kba kbb kbi kbk kbs kbz kia kib kii kik kis kiz kkb kki kkk kks ksa ksb ksi ksk kss saa sab sai sak sas saz sba sbb sbi sbk sbs sia sib sii sik sis sk- ska skb ski skk sks ss- ssa ssb ssi ssk sss ssz sza szi zaa zab zai zak zas zaz zbb zbs zia zib zik zis ziz zka zks zsa zsi zsz zzs zzz