a-a a-b a-i aaa aab aad aaf aai aam aan aao aar ab- aba abb abd abf abi abm abn abo abr ad- ada adb add adf adi adm adn ado adr af- afa afb afd aff afi afm afn afo afr ai- aia aib aid aif aii aim ain aio air ama amb amd amf ami amm amn amo amr an- ana anb and anf ani anm ann ano anr aoa aob aod aof aoi aom aon aoo aor ar- ara arb ard arf ari arm arn aro arr baa bab bad baf bai bam ban bao bar bba bbb bbd bbf bbi bbm bbn bbo bbr bda bdb bdd bdf bdi bdm bdo bdr bfa bfb bfd bff bfi bfm bfn bfo bfr bi- bia bib bid bif bii bim bin bio bir bma bmb bmd bmf bmi bmm bmn bmo bmr bna bnb bnd bnf bni bnn bno bnr boa bob bod bof boi bom bon boo bor bra brb brd brf bri brm brn bro brr daa dab dad daf dai dam dan dao dar dba dbb dbd dbf dbi dbm dbn dbo dbr dda ddb ddd ddf ddi ddm ddn ddo ddr dfa dfb dfd dff dfi dfm dfn dfo dfr di- dia dib did dif dii dim din dio dir dma dmb dmd dmf dmi dmm dmn dmo dmr dna dnb dnd dnf dni dnm dnn dno dnr doa dob dod dof doi dom don doo dor dra drb drd dri drm drn dro drr faa fab fad faf fai fam fan fao far fba fbb fbd fbf fbi fbm fbn fbo fbr fda fdb fdd fdf fdi fdm fdn fdo fdr ffa ffd fff ffi ffm ffn ffo ffr fia fib fid fif fii fim fin fir fma fmb fmd fmf fmi fmm fmn fmo fmr fna fnb fnd fnf fni fnm fnn fnr foa fob fof foi fom fon foo for fra frb frd frf fri frm frn fro frr i-d i-f ia- iaa iab iad iaf iai iam ian iao iar iba ibb ibd ibf ibi ibm ibn ibo ibr ida idb idd idf idi idm idn ido idr ifa ifb ifd iff ifi ifm ifn ifo ifr iia iib iid iif iii iim iin iio iir im- ima imb imd imf imi imm imn imo in- ina inb ind inf ini inm inn ino inr io- ioa iob iod iof ioi iom ion ioo ior ir- ira irb ird irf iri irm irn iro irr m-f m-o m-r maa mab mad maf mai mam man mao mar mba mbb mbd mbf mbi mbm mbo mbr mda mdb mdd mdf mdi mdm mdn mdo mdr mfa mfb mfd mff mfi mfm mfn mfo mfr mi- mia mib mid mif mii mim min mio mir mma mmb mmd mmf mmi mmm mmn mmo mmr mna mnb mnf mni mnm mnn mno mnr moa mob mod mof moi mom mon moo mor mra mrb mrd mrf mri mrm mrn mro mrr n-i naa nab nad naf nai nam nan nao nar nba nbb nbd nbf nbi nbm nbn nbo nbr nda ndb ndd ndf ndi ndm ndn ndo ndr nfa nfb nfd nff nfi nfn nfo nfr nia nib nid nif nii nim nin nio nir nma nmb nmd nmi nmm nmn nmo nmr nna nnb nnf nni nnm nnn nno no- noa nob nod nof noi nom non noo nor nra nrb nrd nrf nri nrm nrn nro nrr o-i oaa oab oad oaf oai oam oan oao oar ob- oba obb obd obf obi obm obn obo obr oda odb odd odf odi odm odn odo odr of- ofa ofb ofd off ofi ofm ofn ofo ofr oia oib oid oif oii oim oin oio oir om- oma omb omd omf omi omm omn omo omr on- ona onb ond onf oni onn ono onr oo- ooa oob ood oof ooi oom oon ooo oor or- ora orb ord orf ori orm orn oro orr ra- raa rab rad raf rai ram ran rao rar rba rbb rbd rbf rbi rbm rbn rbo rbr rda rdb rdd rdf rdi rdm rdn rdo rdr rfa rfb rfd rff rfi rfm rfn rfo rfr ria rib rid rif rii rim rin rio rir rma rmb rmd rmf rmi rmm rmn rmo rmr rna rnb rnd rni rnm rnn rno rnr roa rob rod rof roi rom ron roo ror rra rrb rrd rrf rri rrm rrn rrr