-al -ol a-a a-b a-c aaa aab aac aal aan aao aap aar aas ab- aba abb abc abl abn abo abp abr abs ac- aca acb acc acl acn aco acp acr acs al- ala alb alc all aln alo alp alr als an- ana anb anc anl ann ano anp anr ans aoa aob aoc aol aon aoo aop aor aos ap- apa apb apc apl apn apo app apr aps ar- ara arb arc arl arn aro arp arr ars as- asa asb asc asl asn aso asp asr ass b-p baa bab bac bal ban bao bap bar bas bba bbb bbc bbl bbn bbo bbp bbr bbs bca bcb bcc bcl bcn bco bcp bcr bcs bla blb blc bll bln blo blp blr bls bna bnb bnc bnl bnn bno bnp bnr bns boa bob boc bol bon boo bop bor bos bpa bpb bpc bpl bpn bpo bpp bpr bps bra brb brl brn bro brp brr brs bsa bsb bsc bsl bsn bso bsp bsr bss c-- caa cab cac cal can cao cap car cas cba cbb cbc cbl cbn cbo cbp cbr cbs cca ccb ccc ccl ccn cco ccp ccr ccs cl- cla clb clc cll cln clo clp clr cls cn- cna cnb cnc cnl cnn cno cnp cnr cns co- coa cob coc col con coo cop cor cos cpa cpb cpc cpl cpn cpo cpp cpr cps cra crb crc crl crn cro crp crr crs csa csb csc csl csn cso csp csr css l-p la- laa lab lac lal lan lao lap lar las lba lbb lbc lbl lbo lbp lbr lbs lca lcb lcc lcl lcn lco lcp lcr lcs lla llb llc lll lln llo llp llr lls lna lnb lnc lnl lnn lno lnp lnr lns loa lob loc lol lon loo lop lor los lpa lpb lpc lpl lpn lpo lpp lpr lps lra lrb lrc lrn lro lrp lrr lrs lsa lsb lsc lsl lsn lso lsp lsr lss naa nab nac nal nan nao nap nar nas nba nbb nbc nbl nbn nbo nbp nbr nbs nca ncb ncc ncl ncn nco ncp ncr ncs nla nlb nlc nll nln nlo nlp nlr nls nna nnb nnc nnl nnn nno nnp nns no- noa nob noc nol non noo nop nor nos npa npb npc npl npn npo npp npr nps nra nrb nrc nrl nrn nro nrp nrr nrs nsa nsb nsc nsl nsn nso nsp nsr nss oaa oab oac oal oan oao oap oar oas ob- oba obb obc obl obn obo obp obr obs oc- oca ocb occ ocl ocn oco ocp ocr ocs ola olb olc oll oln olo olp ols on- ona onb onc onl onn ono onp onr ons oo- ooa oob ooc ool oon ooo oop oor oos op- opa opb opc opl opn opo opp opr ops or- ora orb orc orl orn oro orp orr ors os- osa osb osc osl osn oso osp osr oss p-p paa pab pac pal pan pao pap par pas pba pbb pbc pbl pbn pbo pbp pbr pbs pca pcb pcc pcl pcn pco pcp pcr pcs pla plb plc pll pln plo plp plr pls pn- pna pnb pnc pnl pnn pno pnp pnr pns poa pob poc pol pon poo pop por pos ppa ppb ppc ppl ppn ppo ppp ppr pps pra prb prc prl prn pro prp prr prs ps- psa psb psc psl psn pso psp psr pss ra- raa rab rac ral ran rao rap rar ras rba rbb rbc rbl rbn rbo rbp rbr rbs rca rcb rcc rcl rcn rco rcp rcr rcs rla rlc rll rln rlo rlp rlr rls rna rnb rnc rnn rno rnp rnr rns roa rob roc rol ron roo rop ror ros rpa rpb rpc rpl rpn rpo rpp rpr rps rra rrb rrc rrl rrn rrp rrr rrs rsa rsb rsc rsl rsn rso rsp rsr rss saa sab sac sal san sao sap sar sas sba sbb sbc sbl sbn sbo sbp sbr sbs sca scb scc scl scn sco scp scr scs sla slb slc sll sln slo slp slr sls sna snb snc snl snn sno snp snr sns soa sob soc sol son soo sop sor sos spa spb spc spl spn spo spp spr sps sr- sra srb src srl srn sro srp srr srs ss- ssa ssb ssc ssl ssn sso ssp ssr sss