-al a-a a-b a-i a-t aaa aab aai aal aar aas aat aax ab- aba abb abi abl abr abs abt abx ai- aia aib aii ail air ais ait aix al- ala alb ali all alr als alt alx ar- ara arb ari arl arr ars art arx as- asa asb asi asl asr ass ast asx at- ata atb ati atl atr ats att atx ax- axa axi axl axr axs axt axx baa bab bai bal bar bas bat bax bba bbb bbi bbl bbr bbs bbt bbx bi- bia bib bii bil bir bis bit bix bla blb bli bll blr bls blt blx bra brb bri brl brr brs brt brx bsa bsb bsi bsl bsr bss bst bsx bta btb bti btl btr bts btt btx bxb bxi bxl bxx ia- iaa iab iai ial iar ias iat iba ibb ibi ibl ibr ibs ibt ibx iia iib iii iil iir iis iit iix il- ila ilb ili ill ilr ils ilt ilx ir- ira irb iri irl irr irs irt irx is- isa isb isi isl isr iss ist ita itb iti itl its itt itx ixi ixl la- laa lab lai lal lar las lat lax lba lbb lbi lbl lbr lbs lbt lbx lia lib lii lil lir lis lit lix lla llb lli lll llr lls llt lra lrb lri lrr lrs lrt lsa lsb lsi lsl lsr lss lst lta ltb lti ltl ltr lts ltt ltx lxi lxr lxx ra- raa rab rai ral rar ras rat rax rba rbb rbi rbl rbr rbs rbt rbx ria rib rii ril rir ris rit rix rla rli rll rlr rls rlt rra rrb rri rrl rrr rrs rrt rsa rsb rsi rsl rsr rss rst rsx rta rtb rti rtl rtr rts rtt rtx rxr rxs saa sab sai sal sar sas sat sax sba sbb sbi sbl sbr sbs sbt sbx sia sib sii sil sir sis sit six sla slb sli sll slr sls slt slx sr- sra srb sri srl srr srs srt srx ss- ssa ssb ssi ssl ssr sss sst ssx sta stb sti stl str sts stt stx sxi sxl sxs sxt t-x taa tab tai tal tar tas tat tax tba tbb tbi tbl tbr tbs tbt tia tib tii til tir tis tit tix tla tli tll tlr tls tlt tlx tra trb tri trl trr trs trt trx tsa tsb tsi tsl tsr tss tst tsx tta ttb tti ttl ttr tts ttt ttx txi txl txs txt xaa xal xar xas xat xbl xbr xbx xia xii xis xit xix xla xlb xli xlr xls xlt xrt xrx xsa xsb xsi xsl xss xst xti xtr xts xtx xxi xxl xxx