-al -ol a-a a-b a-i aaa aab aaf aai aal aan aao aas ab- aba abb abf abi abl abn abo abs af- afa afb aff afi afl afn afo afs ai- aia aib aif aii ail ain aio ais al- ala alb alf ali all aln alo als an- ana anb anf ani anl ann ano ans aoa aob aof aoi aol aon aoo aos as- asa asb asf asi asl asn aso ass baa bab baf bai bal ban bao bas bba bbb bbf bbi bbl bbn bbo bbs bfa bfb bff bfi bfl bfn bfo bfs bi- bia bib bif bii bil bin bio bis bla blb blf bli bll bln blo bls bna bnb bnf bni bnl bnn bno bns boa bob bof boi bol bon boo bos bsa bsb bsf bsi bsl bsn bso bss faa fab faf fai fal fan fao fas fba fbb fbf fbi fbl fbn fbo fbs ffa fff ffi ffl ffn ffo ffs fia fib fif fii fil fin fis fla flb flf fli fll fln flo fls fna fnb fnf fni fnl fnn fns foa fob fof foi fol fon foo fos fsa fsb fsf fsi fsl fsn fso fss i-f ia- iaa iab iaf iai ial ian iao ias iba ibb ibf ibi ibl ibn ibo ibs ifa ifb iff ifi ifl ifn ifo ifs iia iib iif iii iil iin iio iis il- ila ilb ilf ili ill iln ilo ils in- ina inb inf ini inl inn ino ins io- ioa iob iof ioi iol ion ioo ios is- isa isb isf isi isl isn iso iss la- laa lab laf lai lal lan lao las lba lbb lbf lbi lbl lbo lbs lfa lfb lff lfi lfl lfn lfo lfs lia lib lif lii lil lin lio lis lla llb llf lli lll lln llo lls lna lnb lni lnl lnn lno lns loa lob lof loi lol lon loo los lsa lsb lsf lsi lsl lsn lso lss n-i naa nab naf nai nal nan nao nas nba nbb nbf nbi nbl nbn nbo nbs nfa nfb nff nfi nfl nfn nfo nfs nia nib nif nii nil nin nio nis nla nlb nlf nli nll nln nlo nls nna nnb nnf nni nnl nnn nno nns no- noa nob nof noi nol non noo nos nsa nsb nsf nsi nsl nsn nso nss o-i oaa oab oaf oai oal oan oao oas ob- oba obb obf obi obl obn obo obs of- ofa ofb off ofi ofl ofn ofo ofs oia oib oif oii oil oin oio ois ola olb olf oli oll oln olo ols on- ona onb onf oni onl onn ono ons oo- ooa oob oof ooi ool oon ooo oos os- osa osb osf osi osl osn oso oss saa sab saf sai sal san sao sas sba sbb sbf sbi sbl sbn sbo sbs sfa sfb sff sfi sfl sfn sfo sfs sia sib sif sii sil sin sio sis sla slb slf sli sll sln slo sls sna snb snf sni snl snn sno sns soa sob sof soi sol son soo sos ss- ssa ssb ssf ssi ssl ssn sso sss