-al -ol a-a a-b aaa aab aaf aal aan aao aas aau ab- aba abb abf abl abn abo abs abu af- afa afb aff afl afn afo afs afu al- ala alb alf all aln alo als alu an- ana anb anf anl ann ano ans anu aoa aob aof aol aon aoo aos aou as- asa asb asf asl asn aso ass asu au- aua aub auf aul aun auo aus b-u baa bab baf bal ban bao bas bau bba bbb bbf bbl bbn bbo bbs bbu bfa bfb bff bfl bfn bfo bfs bfu bla blb blf bll bln blo bls blu bna bnb bnf bnl bnn bno bns bnu boa bob bof bol bon boo bos bou bsa bsb bsf bsl bsn bso bss bsu bua bub buf bul bun buo bus buu faa fab faf fal fan fao fas fau fba fbb fbf fbl fbn fbo fbs fbu ffa fff ffl ffn ffo ffs ffu fla flb flf fll fln flo fls flu fna fnb fnf fnl fnn fns fnu foa fob fof fol fon foo fos fou fsa fsb fsf fsl fsn fso fss fsu fua fub fuf ful fun fuo fus fuu la- laa lab laf lal lan lao las lau lba lbb lbf lbl lbo lbs lbu lfa lfb lff lfl lfn lfo lfs lfu lla llb llf lll lln llo lls llu lna lnb lnl lnn lno lns lnu loa lob lof lol lon loo los lou lsa lsb lsf lsl lsn lso lss lsu lua lub luf lul lun luo lus luu naa nab naf nal nan nao nas nau nba nbb nbf nbl nbn nbo nbs nbu nfa nfb nff nfl nfn nfo nfs nfu nla nlb nlf nll nln nlo nls nlu nna nnb nnf nnl nnn nno nns nnu no- noa nob nof nol non noo nos nou nsa nsb nsf nsl nsn nso nss nsu nua nub nul nun nuo nus nuu oaa oab oaf oal oan oao oas oau ob- oba obb obf obl obn obo obs obu of- ofa ofb off ofl ofn ofo ofs ofu ola olb olf oll oln olo ols olu on- ona onb onf onl onn ono ons onu oo- ooa oob oof ool oon ooo oos os- osa osb osf osl osn oso oss osu ou- oua ouf oul oun ouo ous saa sab saf sal san sao sas sau sba sbb sbf sbl sbn sbo sbs sbu sfa sfb sff sfl sfn sfo sfs sfu sla slb slf sll sln slo sls slu sna snb snf snl snn sno sns snu soa sob sof sol son soo sos sou ss- ssa ssb ssf ssl ssn sso sss ssu sua sub suf sul sun suo sus suu ua- uaa uab uaf ual uan uao uas uau uba ubb ubf ubl ubn ubo ubs ubu ufa uff ufl ufn ufo ufs ufu ula ulb ulf ull uln ulo uls ulu un- una unb unf unl unn uno uns unu uoa uob uol uon uoo uos usa usb usf usl usn uso uss usu uua uun uus uuu