-al -ol a-a a-b a-i aaa aab aai aal aan aao aar aas ab- aba abb abi abl abn abo abr abs ai- aia aib aii ail ain aio air ais al- ala alb ali all aln alo alr als an- ana anb ani anl ann ano anr ans aoa aob aoi aol aon aoo aor aos ar- ara arb ari arl arn aro arr ars as- asa asb asi asl asn aso asr ass baa bab bai bal ban bao bar bas bba bbb bbi bbl bbn bbo bbr bbs bi- bia bib bii bil bin bio bir bis bla blb bli bll bln blo blr bls bna bnb bni bnl bnn bno bnr bns boa bob boi bol bon boo bor bos bra brb bri brl brn bro brr brs bsa bsb bsi bsl bsn bso bsr bss ia- iaa iab iai ial ian iao iar ias iba ibb ibi ibl ibn ibo ibr ibs iia iib iii iil iin iio iir iis il- ila ilb ili ill iln ilo ilr ils in- ina inb ini inl inn ino inr ins io- ioa iob ioi iol ion ioo ior ios ir- ira irb iri irl irn iro irr irs is- isa isb isi isl isn iso isr iss la- laa lab lai lal lan lao lar las lba lbb lbi lbl lbo lbr lbs lia lib lii lil lin lio lir lis lla llb lli lll lln llo llr lls lna lnb lni lnl lnn lno lnr lns loa lob loi lol lon loo lor los lra lrb lri lrn lro lrr lrs lsa lsb lsi lsl lsn lso lsr lss n-i naa nab nai nal nan nao nar nas nba nbb nbi nbl nbn nbo nbr nbs nia nib nii nil nin nio nir nis nla nlb nli nll nln nlo nlr nls nna nnb nni nnl nnn nno nns no- noa nob noi nol non noo nor nos nra nrb nri nrl nrn nro nrr nrs nsa nsb nsi nsl nsn nso nsr nss o-i oaa oab oai oal oan oao oar oas ob- oba obb obi obl obn obo obr obs oia oib oii oil oin oio oir ois ola olb oli oll oln olo ols on- ona onb oni onl onn ono onr ons oo- ooa oob ooi ool oon ooo oor oos or- ora orb ori orl orn oro orr ors os- osa osb osi osl osn oso osr oss ra- raa rab rai ral ran rao rar ras rba rbb rbi rbl rbn rbo rbr rbs ria rib rii ril rin rio rir ris rla rli rll rln rlo rlr rls rna rnb rni rnn rno rnr rns roa rob roi rol ron roo ror ros rra rrb rri rrl rrn rrr rrs rsa rsb rsi rsl rsn rso rsr rss saa sab sai sal san sao sar sas sba sbb sbi sbl sbn sbo sbr sbs sia sib sii sil sin sio sir sis sla slb sli sll sln slo slr sls sna snb sni snl snn sno snr sns soa sob soi sol son soo sor sos sr- sra srb sri srl srn sro srr srs ss- ssa ssb ssi ssl ssn sso ssr sss