-al -ol a-a a-b a-i aaa aab aai aal aan aao aap aas ab- aba abb abi abl abn abo abp abs ai- aia aib aii ail ain aio aip ais al- ala alb ali all aln alo alp als an- ana anb ani anl ann ano anp ans aoa aob aoi aol aon aoo aop aos ap- apa apb api apl apn apo app aps as- asa asb asi asl asn aso asp ass b-p baa bab bai bal ban bao bap bas bba bbb bbi bbl bbn bbo bbp bbs bi- bia bib bii bil bin bio bip bis bla blb bli bll bln blo blp bls bna bnb bni bnl bnn bno bnp bns boa bob boi bol bon boo bop bos bpa bpb bpi bpl bpn bpo bpp bps bsa bsb bsi bsl bsn bso bsp bss ia- iaa iab iai ial ian iao iap ias iba ibb ibi ibl ibn ibo ibp ibs iia iib iii iil iin iio iip iis il- ila ilb ili ill iln ilo ilp ils in- ina inb ini inl inn ino inp ins io- ioa iob ioi iol ion ioo iop ios ipa ipb ipi ipl ipn ipo ipp ips is- isa isb isi isl isn iso isp iss l-p la- laa lab lai lal lan lao lap las lba lbb lbi lbl lbo lbp lbs lia lib lii lil lin lio lip lis lla llb lli lll lln llo llp lls lna lnb lni lnl lnn lno lnp lns loa lob loi lol lon loo lop los lpa lpb lpi lpl lpn lpo lpp lps lsa lsb lsi lsl lsn lso lsp lss n-i naa nab nai nal nan nao nap nas nba nbb nbi nbl nbn nbo nbp nbs nia nib nii nil nin nio nip nis nla nlb nli nll nln nlo nlp nls nna nnb nni nnl nnn nno nnp nns no- noa nob noi nol non noo nop nos npa npb npi npl npn npo npp nps nsa nsb nsi nsl nsn nso nsp nss o-i oaa oab oai oal oan oao oap oas ob- oba obb obi obl obn obo obp obs oia oib oii oil oin oio oip ois ola olb oli oll oln olo olp ols on- ona onb oni onl onn ono onp ons oo- ooa oob ooi ool oon ooo oop oos op- opa opb opi opl opn opo opp ops os- osa osb osi osl osn oso osp oss p-p paa pab pai pal pan pao pap pas pba pbb pbi pbl pbn pbo pbp pbs pia pib pii pil pin pio pip pis pla plb pli pll pln plo plp pls pn- pna pnb pni pnl pnn pno pnp pns poa pob poi pol pon poo pop pos ppa ppb ppi ppl ppn ppo ppp pps ps- psa psb psi psl psn pso psp pss saa sab sai sal san sao sap sas sba sbb sbi sbl sbn sbo sbp sbs sia sib sii sil sin sio sip sis sla slb sli sll sln slo slp sls sna snb sni snl snn sno snp sns soa sob soi sol son soo sop sos spa spb spi spl spn spo spp sps ss- ssa ssb ssi ssl ssn sso ssp sss