-al -ol a-a a-b a-i a-z aaa aab aai aal aao aar aas aaz ab- aba abb abi abl abo abr abs abz ai- aia aib aii ail aio air ais aiz al- ala alb ali all alo alr als alz aoa aob aoi aol aoo aor aos ar- ara arb ari arl aro arr ars arz as- asa asb asi asl aso asr ass asz az- aza azb azi azo azs azz baa bab bai bal bao bar bas baz bba bbb bbi bbl bbo bbr bbs bi- bia bib bii bil bio bir bis biz bla blb bli bll blo blr bls blz boa bob boi bol boo bor bos boz bra brb bri brl bro brr brs brz bsa bsb bsi bsl bso bsr bss bza bzo bzr bzs bzz ia- iaa iab iai ial iao iar ias iaz iba ibb ibi ibl ibo ibr ibs ibz iia iib iii iil iio iir iis il- ila ilb ili ill ilo ilr ils ilz io- ioa iob ioi iol ioo ior ios ir- ira irb iri irl iro irr irs is- isa isb isi isl iso isr iss iza izi izo izz la- laa lab lai lal lao lar las laz lba lbb lbi lbl lbo lbr lbs lia lib lii lil lio lir lis liz lla llb lli lll llo llr lls llz loa lob loi lol loo lor los loz lra lrb lri lro lrr lrs lrz lsa lsb lsi lsl lso lsr lss lsz lzi lzo lzr lzs o-i oaa oab oai oal oao oar oas ob- oba obb obi obl obo obr obs oia oib oii oil oio oir ois oiz ola olb oli oll olo ols oo- ooa oob ooi ool ooo oor oos or- ora orb ori orl oro orr ors orz os- osa osb osi osl oso osr oss oza ozo ozs ozz ra- raa rab rai ral rao rar ras raz rba rbb rbi rbl rbo rbr rbs ria rib rii ril rio rir ris riz rla rli rll rlo rlr rls roa rob roi rol roo ror ros roz rra rrb rri rrl rrr rrs rsa rsb rsi rsl rso rsr rss rza rzb rzo saa sab sai sal sao sar sas saz sba sbb sbi sbl sbo sbr sbs sia sib sii sil sio sir sis sla slb sli sll slo slr sls soa sob soi sol soo sor sos soz sr- sra srb sri srl sro srr srs ss- ssa ssb ssi ssl sso ssr sss ssz sza szi szl szr zaa zab zai zao zar zas zaz zbb zbl zbr zbs zia zib zil zio zir zis ziz zla zlr zo- zoa zob zoi zol zoo zor zos zrl zro zrs zsa zsi zsl zsz zzr zzs zzz