-al a-a a-b aaa aab aal aan aar aas ab- aba abb abl abn abr abs al- ala alb all aln alr als an- ana anb anl ann anr ans ar- ara arb arl arn arr ars as- asa asb asl asn asr ass baa bab bal ban bar bas bba bbb bbl bbn bbr bbs bla blb bll bln blr bls bna bnb bnl bnn bnr bns bra brb brl brn brr brs bsa bsb bsl bsn bsr bss la- laa lab lal lan lar las lba lbb lbl lbr lbs lla llb lll lln llr lls lna lnb lnl lnn lnr lns lra lrb lrn lrr lrs lsa lsb lsl lsn lsr lss naa nab nal nan nar nas nba nbb nbl nbn nbr nbs nla nlb nll nln nlr nls nna nnb nnl nnn nns nra nrb nrl nrn nrr nrs nsa nsb nsl nsn nsr nss ra- raa rab ral ran rar ras rba rbb rbl rbn rbr rbs rla rll rln rlr rls rna rnb rnn rnr rns rra rrb rrl rrn rrr rrs rsa rsb rsl rsn rsr rss saa sab sal san sar sas sba sbb sbl sbn sbr sbs sla slb sll sln slr sls sna snb snl snn snr sns sr- sra srb srl srn srr srs ss- ssa ssb ssl ssn ssr sss