-al a-a a-c a-t aaa aac aae aal aas aat aax ac- aca acc ace acl acs act acx aea aec aee ael aes aet aex al- ala alc ale all als alt alx as- asa asc ase asl ass ast asx at- ata atc ate atl ats att atx ax- axa axe axl axs axt axx c-- caa cac cae cal cas cat cax cca ccc cce ccl ccs cct ccx ce- cea cec cee cel ces cet cex cl- cla clc cle cll cls clt clx csa csc cse csl css cst csx cta ctc cte ctl cts ctt ctx cxc cxl cxs cxt cxx eaa eac eae eal eas eat eax ec- eca ecc ece ecl ecs ect ecx eea eec eee eel ees eet eex ela elc ele ell els elt elx es- esa esc ese esl ess est esx eta etc ete etl ets ett etx ex- exa exc exe exl exs ext exx la- laa lac lae lal las lat lax lca lcc lce lcl lcs lct lcx lea lec lee lel les let lex lla llc lle lll lls llt lsa lsc lse lsl lss lst lta ltc lte ltl lts ltt ltx lxc lxx saa sac sae sal sas sat sax sca scc sce scl scs sct scx se- sea sec see sel ses set sex sla slc sle sll sls slt slx ss- ssa ssc sse ssl sss sst ssx sta stc ste stl sts stt stx sxc sxl sxs sxt t-x taa tac tae tal tas tat tax tca tcc tce tcl tcs tct tcx te- tea tec tee tel tes tet tex tla tlc tle tll tls tlt tlx tsa tsc tse tsl tss tst tsx tta ttc tte ttl tts ttt ttx txe txl txs txt xaa xac xal xas xat xcl xcx xee xel xes xet xex xla xls xlt xsa xsc xsl xss xst xtc xts xtx xxl xxx