-al -ol a-a a-b a-i aaa aab aai aal aan aao aap aar ab- aba abb abi abl abn abo abp abr ai- aia aib aii ail ain aio aip air al- ala alb ali all aln alo alp alr an- ana anb ani anl ann ano anp anr aoa aob aoi aol aon aoo aop aor ap- apa apb api apl apn apo app apr ar- ara arb ari arl arn aro arp arr b-p baa bab bai bal ban bao bap bar bba bbb bbi bbl bbn bbo bbp bbr bi- bia bib bii bil bin bio bip bir bla blb bli bll bln blo blp blr bna bnb bni bnl bnn bno bnp bnr boa bob boi bol bon boo bop bor bpa bpb bpi bpl bpn bpo bpp bpr bra brb bri brl brn bro brp brr ia- iaa iab iai ial ian iao iap iar iba ibb ibi ibl ibn ibo ibp ibr iia iib iii iil iin iio iip iir il- ila ilb ili ill iln ilo ilp ilr in- ina inb ini inl inn ino inp inr io- ioa iob ioi iol ion ioo iop ior ipa ipb ipi ipl ipn ipo ipp ipr ir- ira irb iri irl irn iro irp irr l-p la- laa lab lai lal lan lao lap lar lba lbb lbi lbl lbo lbp lbr lia lib lii lil lin lio lip lir lla llb lli lll lln llo llp llr lna lnb lni lnl lnn lno lnp lnr loa lob loi lol lon loo lop lor lpa lpb lpi lpl lpn lpo lpp lpr lra lrb lri lrn lro lrp lrr n-i naa nab nai nal nan nao nap nar nba nbb nbi nbl nbn nbo nbp nbr nia nib nii nil nin nio nip nir nla nlb nli nll nln nlo nlp nlr nna nnb nni nnl nnn nno nnp no- noa nob noi nol non noo nop nor npa npb npi npl npn npo npp npr nra nrb nri nrl nrn nro nrp nrr o-i oaa oab oai oal oan oao oap oar ob- oba obb obi obl obn obo obp obr oia oib oii oil oin oio oip oir ola olb oli oll oln olo olp on- ona onb oni onl onn ono onp onr oo- ooa oob ooi ool oon ooo oop oor op- opa opb opi opl opn opo opp opr or- ora orb ori orl orn oro orp orr p-p paa pab pai pal pan pao pap par pba pbb pbi pbl pbn pbo pbp pbr pia pib pii pil pin pio pip pir pla plb pli pll pln plo plp plr pn- pna pnb pni pnl pnn pno pnp pnr poa pob poi pol pon poo pop por ppa ppb ppi ppl ppn ppo ppp ppr pra prb pri prl prn pro prp prr ra- raa rab rai ral ran rao rap rar rba rbb rbi rbl rbn rbo rbp rbr ria rib rii ril rin rio rip rir rla rli rll rln rlo rlp rlr rna rnb rni rnn rno rnp rnr roa rob roi rol ron roo rop ror rpa rpb rpi rpl rpn rpo rpp rpr rra rrb rri rrl rrn rrp rrr