-al -ol a-a a-b a-i aaa aab aaf aai aal aan aao aar aas ab- aba abb abf abi abl abn abo abr abs af- afa afb aff afi afl afn afo afr afs ai- aia aib aif aii ail ain aio air ais al- ala alb alf ali all aln alo alr als an- ana anb anf ani anl ann ano anr ans aoa aob aof aoi aol aon aoo aor aos ar- ara arb arf ari arl arn aro arr ars as- asa asb asf asi asl asn aso asr ass baa bab baf bai bal ban bao bar bas bba bbb bbf bbi bbl bbn bbo bbr bbs bfa bfb bff bfi bfl bfn bfo bfr bfs bi- bia bib bif bii bil bin bio bir bis bla blb blf bli bll bln blo blr bls bna bnb bnf bni bnl bnn bno bnr bns boa bob bof boi bol bon boo bor bos bra brb brf bri brl brn bro brr brs bsa bsb bsf bsi bsl bsn bso bsr bss faa fab faf fai fal fan fao far fas fba fbb fbf fbi fbl fbn fbo fbr fbs ffa fff ffi ffl ffn ffo ffr ffs fia fib fif fii fil fin fir fis fla flb flf fli fll fln flo flr fls fna fnb fnf fni fnl fnn fnr fns foa fob fof foi fol fon foo for fos fra frb frf fri frl frn fro frr frs fsa fsb fsf fsi fsl fsn fso fsr fss i-f ia- iaa iab iaf iai ial ian iao iar ias iba ibb ibf ibi ibl ibn ibo ibr ibs ifa ifb iff ifi ifl ifn ifo ifr ifs iia iib iif iii iil iin iio iir iis il- ila ilb ilf ili ill iln ilo ilr ils in- ina inb inf ini inl inn ino inr ins io- ioa iob iof ioi iol ion ioo ior ios ir- ira irb irf iri irl irn iro irr irs is- isa isb isf isi isl isn iso isr iss la- laa lab laf lai lal lan lao lar las lba lbb lbf lbi lbl lbo lbr lbs lfa lfb lff lfi lfl lfn lfo lfr lfs lia lib lif lii lil lin lio lir lis lla llb llf lli lll lln llo llr lls lna lnb lni lnl lnn lno lnr lns loa lob lof loi lol lon loo lor los lra lrb lrf lri lrn lro lrr lrs lsa lsb lsf lsi lsl lsn lso lsr lss n-i naa nab naf nai nal nan nao nar nas nba nbb nbf nbi nbl nbn nbo nbr nbs nfa nfb nff nfi nfl nfn nfo nfr nfs nia nib nif nii nil nin nio nir nis nla nlb nlf nli nll nln nlo nlr nls nna nnb nnf nni nnl nnn nno nns no- noa nob nof noi nol non noo nor nos nra nrb nrf nri nrl nrn nro nrr nrs nsa nsb nsf nsi nsl nsn nso nsr nss o-i oaa oab oaf oai oal oan oao oar oas ob- oba obb obf obi obl obn obo obr obs of- ofa ofb off ofi ofl ofn ofo ofr ofs oia oib oif oii oil oin oio oir ois ola olb olf oli oll oln olo ols on- ona onb onf oni onl onn ono onr ons oo- ooa oob oof ooi ool oon ooo oor oos or- ora orb orf ori orl orn oro orr ors os- osa osb osf osi osl osn oso osr oss ra- raa rab raf rai ral ran rao rar ras rba rbb rbf rbi rbl rbn rbo rbr rbs rfa rfb rff rfi rfl rfn rfo rfr rfs ria rib rif rii ril rin rio rir ris rla rlf rli rll rln rlo rlr rls rna rnb rni rnn rno rnr rns roa rob rof roi rol ron roo ror ros rra rrb rrf rri rrl rrn rrr rrs rsa rsb rsf rsi rsl rsn rso rsr rss saa sab saf sai sal san sao sar sas sba sbb sbf sbi sbl sbn sbo sbr sbs sfa sfb sff sfi sfl sfn sfo sfr sfs sia sib sif sii sil sin sio sir sis sla slb slf sli sll sln slo slr sls sna snb snf sni snl snn sno snr sns soa sob sof soi sol son soo sor sos sr- sra srb srf sri srl srn sro srr srs ss- ssa ssb ssf ssi ssl ssn sso ssr sss