-al a-a a-b a-i aaa aab aai aal aan aap aar ab- aba abb abi abl abn abp abr ai- aia aib aii ail ain aip air al- ala alb ali all aln alp alr an- ana anb ani anl ann anp anr ap- apa apb api apl apn app apr ar- ara arb ari arl arn arp arr b-p baa bab bai bal ban bap bar bba bbb bbi bbl bbn bbp bbr bi- bia bib bii bil bin bip bir bla blb bli bll bln blp blr bna bnb bni bnl bnn bnp bnr bpa bpb bpi bpl bpn bpp bpr bra brb bri brl brn brp brr ia- iaa iab iai ial ian iap iar iba ibb ibi ibl ibn ibp ibr iia iib iii iil iin iip iir il- ila ilb ili ill iln ilp ilr in- ina inb ini inl inn inp inr ipa ipb ipi ipl ipn ipp ipr ir- ira irb iri irl irn irp irr l-p la- laa lab lai lal lan lap lar lba lbb lbi lbl lbp lbr lia lib lii lil lin lip lir lla llb lli lll lln llp llr lna lnb lni lnl lnn lnp lnr lpa lpb lpi lpl lpn lpp lpr lra lrb lri lrn lrp lrr n-i naa nab nai nal nan nap nar nba nbb nbi nbl nbn nbp nbr nia nib nii nil nin nip nir nla nlb nli nll nln nlp nlr nna nnb nni nnl nnn nnp npa npb npi npl npn npp npr nra nrb nri nrl nrn nrp nrr p-p paa pab pai pal pan pap par pba pbb pbi pbl pbn pbp pbr pia pib pii pil pin pip pir pla plb pli pll pln plp plr pn- pna pnb pni pnl pnn pnp pnr ppa ppb ppi ppl ppn ppp ppr pra prb pri prl prn prp prr ra- raa rab rai ral ran rap rar rba rbb rbi rbl rbn rbp rbr ria rib rii ril rin rip rir rla rli rll rln rlp rlr rna rnb rni rnn rnp rnr rpa rpb rpi rpl rpn rpp rpr rra rrb rri rrl rrn rrp rrr