-al -ol a-a a-c aaa aac aae aaf aal aao aas aax ac- aca acc ace acf acl aco acs acx aea aec aee aef ael aeo aes aex af- afa afc afe aff afl afo afs afx al- ala alc ale alf all alo als alx aoa aoc aoe aof aol aoo aos aox as- asa asc ase asf asl aso ass asx ax- axa axe axl axo axs axx c-- caa cac cae caf cal cao cas cax cca ccc cce ccf ccl cco ccs ccx ce- cea cec cee cef cel ceo ces cex cfa cfc cfe cff cfl cfo cfs cfx cl- cla clc cle clf cll clo cls clx co- coa coc coe cof col coo cos cox csa csc cse csf csl cso css csx cxc cxf cxl cxo cxs cxx eaa eac eae eaf eal eao eas eax ec- eca ecc ece ecf ecl eco ecs ecx eea eec eee eef eel eeo ees eex ef- efa efc efe eff efl efo efs efx ela elc ele elf ell elo els elx eo- eoa eoc eoe eof eol eoo eos es- esa esc ese esf esl eso ess esx ex- exa exc exe exl exo exs exx faa fac fae faf fal fao fas fax fca fcc fce fcf fcl fco fcs fcx fea fec fee fef fel feo fes fex ffa ffc ffe fff ffl ffo ffs ffx fla flc fle flf fll flo fls flx foa foc foe fof fol foo fos fox fsa fsc fse fsf fsl fso fss fsx fxe fxs fxx la- laa lac lae laf lal lao las lax lca lcc lce lcf lcl lco lcs lcx lea lec lee lef lel leo les lex lfa lfc lfe lff lfl lfo lfs lfx lla llc lle llf lll llo lls loa loc loe lof lol loo los lox lsa lsc lse lsf lsl lso lss lxc lxo lxx oaa oac oae oaf oal oao oas oax oc- oca occ ocf ocl oco ocs ocx oea oec oee oef oel oeo oes oex of- ofa ofc ofe off ofl ofo ofs ofx ola olc ole olf oll olo ols oo- ooa ooc oof ool ooo oos oox os- osa osc ose osf osl oso oss osx ox- oxa oxc oxf oxo oxx saa sac sae saf sal sao sas sax sca scc sce scf scl sco scs scx se- sea sec see sef sel seo ses sex sfa sfc sfe sff sfl sfo sfs sfx sla slc sle slf sll slo sls slx soa soc soe sof sol soo sos sox ss- ssa ssc sse ssf ssl sso sss ssx sxc sxl sxs xaa xac xaf xal xas xcf xcl xcx xee xel xes xex xfa xfe xfl xfs xfx xla xlf xls xoa xoc xof xoo xos xox xsa xsc xsl xss xxl xxo xxx