-al -ol a-a a-b aaa aab aal aan aao aap aar aas ab- aba abb abl abn abo abp abr abs al- ala alb all aln alo alp alr als an- ana anb anl ann ano anp anr ans aoa aob aol aon aoo aop aor aos ap- apa apb apl apn apo app apr aps ar- ara arb arl arn aro arp arr ars as- asa asb asl asn aso asp asr ass b-p baa bab bal ban bao bap bar bas bba bbb bbl bbn bbo bbp bbr bbs bla blb bll bln blo blp blr bls bna bnb bnl bnn bno bnp bnr bns boa bob bol bon boo bop bor bos bpa bpb bpl bpn bpo bpp bpr bps bra brb brl brn bro brp brr brs bsa bsb bsl bsn bso bsp bsr bss l-p la- laa lab lal lan lao lap lar las lba lbb lbl lbo lbp lbr lbs lla llb lll lln llo llp llr lls lna lnb lnl lnn lno lnp lnr lns loa lob lol lon loo lop lor los lpa lpb lpl lpn lpo lpp lpr lps lra lrb lrn lro lrp lrr lrs lsa lsb lsl lsn lso lsp lsr lss naa nab nal nan nao nap nar nas nba nbb nbl nbn nbo nbp nbr nbs nla nlb nll nln nlo nlp nlr nls nna nnb nnl nnn nno nnp nns no- noa nob nol non noo nop nor nos npa npb npl npn npo npp npr nps nra nrb nrl nrn nro nrp nrr nrs nsa nsb nsl nsn nso nsp nsr nss oaa oab oal oan oao oap oar oas ob- oba obb obl obn obo obp obr obs ola olb oll oln olo olp ols on- ona onb onl onn ono onp onr ons oo- ooa oob ool oon ooo oop oor oos op- opa opb opl opn opo opp opr ops or- ora orb orl orn oro orp orr ors os- osa osb osl osn oso osp osr oss p-p paa pab pal pan pao pap par pas pba pbb pbl pbn pbo pbp pbr pbs pla plb pll pln plo plp plr pls pn- pna pnb pnl pnn pno pnp pnr pns poa pob pol pon poo pop por pos ppa ppb ppl ppn ppo ppp ppr pps pra prb prl prn pro prp prr prs ps- psa psb psl psn pso psp psr pss ra- raa rab ral ran rao rap rar ras rba rbb rbl rbn rbo rbp rbr rbs rla rll rln rlo rlp rlr rls rna rnb rnn rno rnp rnr rns roa rob rol ron roo rop ror ros rpa rpb rpl rpn rpo rpp rpr rps rra rrb rrl rrn rrp rrr rrs rsa rsb rsl rsn rso rsp rsr rss saa sab sal san sao sap sar sas sba sbb sbl sbn sbo sbp sbr sbs sla slb sll sln slo slp slr sls sna snb snl snn sno snp snr sns soa sob sol son soo sop sor sos spa spb spl spn spo spp spr sps sr- sra srb srl srn sro srp srr srs ss- ssa ssb ssl ssn sso ssp ssr sss