-al -ol a-a a-b a-c aaa aab aac aaf aal aan aao aar aas aau ab- aba abb abc abf abl abn abo abr abs abu ac- aca acb acc acf acl acn aco acr acs acu af- afa afb afc aff afl afn afo afr afs afu al- ala alb alc alf all aln alo alr als alu an- ana anb anc anf anl ann ano anr ans anu aoa aob aoc aof aol aon aoo aor aos aou ar- ara arb arc arf arl arn aro arr ars aru as- asa asb asc asf asl asn aso asr ass asu au- aua aub auc auf aul aun auo aur aus b-u baa bab bac baf bal ban bao bar bas bau bba bbb bbc bbf bbl bbn bbo bbr bbs bbu bca bcb bcc bcf bcl bcn bco bcr bcs bcu bfa bfb bfc bff bfl bfn bfo bfr bfs bfu bla blb blc blf bll bln blo blr bls blu bna bnb bnc bnf bnl bnn bno bnr bns bnu boa bob boc bof bol bon boo bor bos bou bra brb brf brl brn bro brr brs bru bsa bsb bsc bsf bsl bsn bso bsr bss bsu bua bub buc buf bul bun buo bur bus buu c-- caa cab cac caf cal can cao car cas cau cba cbb cbc cbf cbl cbn cbo cbr cbs cbu cca ccb ccc ccf ccl ccn cco ccr ccs ccu cfa cfb cfc cff cfl cfn cfo cfr cfs cfu cl- cla clb clc clf cll cln clo clr cls clu cn- cna cnb cnc cnf cnl cnn cno cnr cns cnu co- coa cob coc cof col con coo cor cos cou cra crb crc crf crl crn cro crr crs cru csa csb csc csf csl csn cso csr css csu cua cub cuc cuf cul cun cuo cur cus cuu faa fab fac faf fal fan fao far fas fau fba fbb fbc fbf fbl fbn fbo fbr fbs fbu fca fcb fcc fcf fcl fcn fco fcr fcs fcu ffa ffc fff ffl ffn ffo ffr ffs ffu fla flb flc flf fll fln flo flr fls flu fna fnb fnc fnf fnl fnn fnr fns fnu foa fob foc fof fol fon foo for fos fou fra frb frc frf frl frn fro frr frs fru fsa fsb fsc fsf fsl fsn fso fsr fss fsu fua fub fuf ful fun fuo fur fus fuu la- laa lab lac laf lal lan lao lar las lau lba lbb lbc lbf lbl lbo lbr lbs lbu lca lcb lcc lcf lcl lcn lco lcr lcs lcu lfa lfb lfc lff lfl lfn lfo lfr lfs lfu lla llb llc llf lll lln llo llr lls llu lna lnb lnc lnl lnn lno lnr lns lnu loa lob loc lof lol lon loo lor los lou lra lrb lrc lrf lrn lro lrr lrs lru lsa lsb lsc lsf lsl lsn lso lsr lss lsu lua lub luc luf lul lun luo lur lus luu naa nab nac naf nal nan nao nar nas nau nba nbb nbc nbf nbl nbn nbo nbr nbs nbu nca ncb ncc ncf ncl ncn nco ncr ncs ncu nfa nfb nfc nff nfl nfn nfo nfr nfs nfu nla nlb nlc nlf nll nln nlo nlr nls nlu nna nnb nnc nnf nnl nnn nno nns nnu no- noa nob noc nof nol non noo nor nos nou nra nrb nrc nrf nrl nrn nro nrr nrs nru nsa nsb nsc nsf nsl nsn nso nsr nss nsu nua nub nuc nul nun nuo nur nus nuu oaa oab oac oaf oal oan oao oar oas oau ob- oba obb obc obf obl obn obo obr obs obu oc- oca ocb occ ocf ocl ocn oco ocr ocs ocu of- ofa ofb ofc off ofl ofn ofo ofr ofs ofu ola olb olc olf oll oln olo ols olu on- ona onb onc onf onl onn ono onr ons onu oo- ooa oob ooc oof ool oon ooo oor oos or- ora orb orc orf orl orn oro orr ors oru os- osa osb osc osf osl osn oso osr oss osu ou- oua ouc ouf oul oun ouo our ous ra- raa rab rac raf ral ran rao rar ras rau rba rbb rbc rbf rbl rbn rbo rbr rbs rbu rca rcb rcc rcf rcl rcn rco rcr rcs rcu rfa rfb rfc rff rfl rfn rfo rfr rfs rfu rla rlc rlf rll rln rlo rlr rls rlu rna rnb rnc rnn rno rnr rns rnu roa rob roc rof rol ron roo ror ros rou rra rrb rrc rrf rrl rrn rrr rrs rru rsa rsb rsc rsf rsl rsn rso rsr rss rsu rua rub ruc ruf run ruo rur rus ruu saa sab sac saf sal san sao sar sas sau sba sbb sbc sbf sbl sbn sbo sbr sbs sbu sca scb scc scf scl scn sco scr scs scu sfa sfb sfc sff sfl sfn sfo sfr sfs sfu sla slb slc slf sll sln slo slr sls slu sna snb snc snf snl snn sno snr sns snu soa sob soc sof sol son soo sor sos sou sr- sra srb src srf srl srn sro srr srs ss- ssa ssb ssc ssf ssl ssn sso ssr sss ssu sua sub suc suf sul sun suo sur sus suu ua- uaa uab uac uaf ual uan uao uar uas uau uba ubb ubc ubf ubl ubn ubo ubr ubs ubu uca ucb ucc ucf ucl ucn uco ucr ucs ucu ufa ufc uff ufl ufn ufo ufr ufs ufu ula ulb ulc ulf ull uln ulo ulr uls ulu un- una unb unc unf unl unn uno unr uns unu uoa uob uoc uol uon uoo uor uos ur- ura urb urc urf url urn uro urr urs uru usa usb usc usf usl usn uso usr uss