-al -ol a-a a-b a-i aaa aab aai aal aan aao aap aar aas ab- aba abb abi abl abn abo abp abr abs ai- aia aib aii ail ain aio aip air ais al- ala alb ali all aln alo alp alr als an- ana anb ani anl ann ano anp anr ans aoa aob aoi aol aon aoo aop aor aos ap- apa apb api apl apn apo app apr aps ar- ara arb ari arl arn aro arp arr ars as- asa asb asi asl asn aso asp asr ass b-p baa bab bai bal ban bao bap bar bas bba bbb bbi bbl bbn bbo bbp bbr bbs bi- bia bib bii bil bin bio bip bir bis bla blb bli bll bln blo blp blr bls bna bnb bni bnl bnn bno bnp bnr bns boa bob boi bol bon boo bop bor bos bpa bpb bpi bpl bpn bpo bpp bpr bps bra brb bri brl brn bro brp brr brs bsa bsb bsi bsl bsn bso bsp bsr bss ia- iaa iab iai ial ian iao iap iar ias iba ibb ibi ibl ibn ibo ibp ibr ibs iia iib iii iil iin iio iip iir iis il- ila ilb ili ill iln ilo ilp ilr ils in- ina inb ini inl inn ino inp inr ins io- ioa iob ioi iol ion ioo iop ior ios ipa ipb ipi ipl ipn ipo ipp ipr ips ir- ira irb iri irl irn iro irp irr irs is- isa isb isi isl isn iso isp isr iss l-p la- laa lab lai lal lan lao lap lar las lba lbb lbi lbl lbo lbp lbr lbs lia lib lii lil lin lio lip lir lis lla llb lli lll lln llo llp llr lls lna lnb lni lnl lnn lno lnp lnr lns loa lob loi lol lon loo lop lor los lpa lpb lpi lpl lpn lpo lpp lpr lps lra lrb lri lrn lro lrp lrr lrs lsa lsb lsi lsl lsn lso lsp lsr lss n-i naa nab nai nal nan nao nap nar nas nba nbb nbi nbl nbn nbo nbp nbr nbs nia nib nii nil nin nio nip nir nis nla nlb nli nll nln nlo nlp nlr nls nna nnb nni nnl nnn nno nnp nns no- noa nob noi nol non noo nop nor nos npa npb npi npl npn npo npp npr nps nra nrb nri nrl nrn nro nrp nrr nrs nsa nsb nsi nsl nsn nso nsp nsr nss o-i oaa oab oai oal oan oao oap oar oas ob- oba obb obi obl obn obo obp obr obs oia oib oii oil oin oio oip oir ois ola olb oli oll oln olo olp ols on- ona onb oni onl onn ono onp onr ons oo- ooa oob ooi ool oon ooo oop oor oos op- opa opb opi opl opn opo opp opr ops or- ora orb ori orl orn oro orp orr ors os- osa osb osi osl osn oso osp osr oss p-p paa pab pai pal pan pao pap par pas pba pbb pbi pbl pbn pbo pbp pbr pbs pia pib pii pil pin pio pip pir pis pla plb pli pll pln plo plp plr pls pn- pna pnb pni pnl pnn pno pnp pnr pns poa pob poi pol pon poo pop por pos ppa ppb ppi ppl ppn ppo ppp ppr pps pra prb pri prl prn pro prp prr prs ps- psa psb psi psl psn pso psp psr pss ra- raa rab rai ral ran rao rap rar ras rba rbb rbi rbl rbn rbo rbp rbr rbs ria rib rii ril rin rio rip rir ris rla rli rll rln rlo rlp rlr rls rna rnb rni rnn rno rnp rnr rns roa rob roi rol ron roo rop ror ros rpa rpb rpi rpl rpn rpo rpp rpr rps rra rrb rri rrl rrn rrp rrr rrs rsa rsb rsi rsl rsn rso rsp rsr rss saa sab sai sal san sao sap sar sas sba sbb sbi sbl sbn sbo sbp sbr sbs sia sib sii sil sin sio sip sir sis sla slb sli sll sln slo slp slr sls sna snb sni snl snn sno snp snr sns soa sob soi sol son soo sop sor sos spa spb spi spl spn spo spp spr sps sr- sra srb sri srl srn sro srp srr srs ss- ssa ssb ssi ssl ssn sso ssp ssr sss