-al -ol a-a a-b aaa aab aal aan aao aap aas ab- aba abb abl abn abo abp abs al- ala alb all aln alo alp als an- ana anb anl ann ano anp ans aoa aob aol aon aoo aop aos ap- apa apb apl apn apo app aps as- asa asb asl asn aso asp ass b-p baa bab bal ban bao bap bas bba bbb bbl bbn bbo bbp bbs bla blb bll bln blo blp bls bna bnb bnl bnn bno bnp bns boa bob bol bon boo bop bos bpa bpb bpl bpn bpo bpp bps bsa bsb bsl bsn bso bsp bss l-p la- laa lab lal lan lao lap las lba lbb lbl lbo lbp lbs lla llb lll lln llo llp lls lna lnb lnl lnn lno lnp lns loa lob lol lon loo lop los lpa lpb lpl lpn lpo lpp lps lsa lsb lsl lsn lso lsp lss naa nab nal nan nao nap nas nba nbb nbl nbn nbo nbp nbs nla nlb nll nln nlo nlp nls nna nnb nnl nnn nno nnp nns no- noa nob nol non noo nop nos npa npb npl npn npo npp nps nsa nsb nsl nsn nso nsp nss oaa oab oal oan oao oap oas ob- oba obb obl obn obo obp obs ola olb oll oln olo olp ols on- ona onb onl onn ono onp ons oo- ooa oob ool oon ooo oop oos op- opa opb opl opn opo opp ops os- osa osb osl osn oso osp oss p-p paa pab pal pan pao pap pas pba pbb pbl pbn pbo pbp pbs pla plb pll pln plo plp pls pn- pna pnb pnl pnn pno pnp pns poa pob pol pon poo pop pos ppa ppb ppl ppn ppo ppp pps ps- psa psb psl psn pso psp pss saa sab sal san sao sap sas sba sbb sbl sbn sbo sbp sbs sla slb sll sln slo slp sls sna snb snl snn sno snp sns soa sob sol son soo sop sos spa spb spl spn spo spp sps ss- ssa ssb ssl ssn sso ssp sss