-al a-a a-b a-i aaa aab aai aal aan aar aas ab- aba abb abi abl abn abr abs ai- aia aib aii ail ain air ais al- ala alb ali all aln alr als an- ana anb ani anl ann anr ans ar- ara arb ari arl arn arr ars as- asa asb asi asl asn asr ass baa bab bai bal ban bar bas bba bbb bbi bbl bbn bbr bbs bi- bia bib bii bil bin bir bis bla blb bli bll bln blr bls bna bnb bni bnl bnn bnr bns bra brb bri brl brn brr brs bsa bsb bsi bsl bsn bsr bss ia- iaa iab iai ial ian iar ias iba ibb ibi ibl ibn ibr ibs iia iib iii iil iin iir iis il- ila ilb ili ill iln ilr ils in- ina inb ini inl inn inr ins ir- ira irb iri irl irn irr irs is- isa isb isi isl isn isr iss la- laa lab lai lal lan lar las lba lbb lbi lbl lbr lbs lia lib lii lil lin lir lis lla llb lli lll lln llr lls lna lnb lni lnl lnn lnr lns lra lrb lri lrn lrr lrs lsa lsb lsi lsl lsn lsr lss n-i naa nab nai nal nan nar nas nba nbb nbi nbl nbn nbr nbs nia nib nii nil nin nir nis nla nlb nli nll nln nlr nls nna nnb nni nnl nnn nns nra nrb nri nrl nrn nrr nrs nsa nsb nsi nsl nsn nsr nss ra- raa rab rai ral ran rar ras rba rbb rbi rbl rbn rbr rbs ria rib rii ril rin rir ris rla rli rll rln rlr rls rna rnb rni rnn rnr rns rra rrb rri rrl rrn rrr rrs rsa rsb rsi rsl rsn rsr rss saa sab sai sal san sar sas sba sbb sbi sbl sbn sbr sbs sia sib sii sil sin sir sis sla slb sli sll sln slr sls sna snb sni snl snn snr sns sr- sra srb sri srl srn srr srs ss- ssa ssb ssi ssl ssn ssr sss