-al -ol a-a a-b a-i aaa aab aai aal aan aao aap ab- aba abb abi abl abn abo abp ai- aia aib aii ail ain aio aip al- ala alb ali all aln alo alp an- ana anb ani anl ann ano anp aoa aob aoi aol aon aoo aop ap- apa apb api apl apn apo app b-p baa bab bai bal ban bao bap bba bbb bbi bbl bbn bbo bbp bi- bia bib bii bil bin bio bip bla blb bli bll bln blo blp bna bnb bni bnl bnn bno bnp boa bob boi bol bon boo bop bpa bpb bpi bpl bpn bpo bpp ia- iaa iab iai ial ian iao iap iba ibb ibi ibl ibn ibo ibp iia iib iii iil iin iio iip il- ila ilb ili ill iln ilo ilp in- ina inb ini inl inn ino inp io- ioa iob ioi iol ion ioo iop ipa ipb ipi ipl ipn ipo ipp l-p la- laa lab lai lal lan lao lap lba lbb lbi lbl lbo lbp lia lib lii lil lin lio lip lla llb lli lll lln llo llp lna lnb lni lnl lnn lno lnp loa lob loi lol lon loo lop lpa lpb lpi lpl lpn lpo lpp n-i naa nab nai nal nan nao nap nba nbb nbi nbl nbn nbo nbp nia nib nii nil nin nio nip nla nlb nli nll nln nlo nlp nna nnb nni nnl nnn nno nnp no- noa nob noi nol non noo nop npa npb npi npl npn npo npp o-i oaa oab oai oal oan oao oap ob- oba obb obi obl obn obo obp oia oib oii oil oin oio oip ola olb oli oll oln olo olp on- ona onb oni onl onn ono onp oo- ooa oob ooi ool oon ooo oop op- opa opb opi opl opn opo opp p-p paa pab pai pal pan pao pap pba pbb pbi pbl pbn pbo pbp pia pib pii pil pin pio pip pla plb pli pll pln plo plp pn- pna pnb pni pnl pnn pno pnp poa pob poi pol pon poo pop ppa ppb ppi ppl ppn ppo ppp