-al -er a-a a-c a-t aaa aac aae aaf aal aar aat aax ac- aca acc ace acf acl acr act acx aea aec aee aef ael aer aet aex af- afa afc afe aff afl afr aft afx al- ala alc ale alf all alr alt alx ar- ara arc are arf arl arr art arx at- ata atc ate atf atl atr att atx ax- axa axe axl axr axt axx c-- caa cac cae caf cal car cat cax cca ccc cce ccf ccl ccr cct ccx ce- cea cec cee cef cel cer cet cex cfa cfc cfe cff cfl cfr cft cfx cl- cla clc cle clf cll clr clt clx cra crc cre crf crl crr crt crx cta ctc cte ctf ctl ctr ctt ctx cxc cxf cxl cxr cxt cxx eaa eac eae eaf eal ear eat eax ec- eca ecc ece ecf ecl ecr ect ecx eea eec eee eef eel eer eet eex ef- efa efc efe eff efl efr eft efx ela elc ele elf ell elr elt elx era erc ere erf erl err ert eta etc ete etf etl etr ett etx ex- exa exc exe exl exr ext exx faa fac fae faf fal far fat fax fca fcc fce fcf fcl fcr fct fcx fea fec fee fef fel fer fet fex ffa ffc ffe fff ffl ffr fft ffx fla flc fle flf fll flr flt flx fra frc fre frf frl frr frt fta ftc fte ftf ftl ftr ftt ftx fxe fxr fxt fxx la- laa lac lae laf lal lar lat lax lca lcc lce lcf lcl lcr lct lcx lea lec lee lef lel ler let lex lfa lfc lfe lff lfl lfr lft lfx lla llc lle llf lll llr llt lra lrc lrf lrr lrt lta ltc lte ltf ltl ltr ltt ltx lxc lxr lxx ra- raa rac rae raf ral rar rat rax rca rcc rce rcf rcl rcr rct rcx re- rea rec ree ref rel rer ret rex rfa rfc rfe rff rfl rfr rft rla rlc rle rlf rll rlr rlt rra rrc rrf rrl rrr rrt rta rtc rte rtf rtl rtr rtt rtx rxr t-x taa tac tae taf tal tar tat tax tca tcc tce tcf tcl tcr tct tcx te- tea tec tee tef tel ter tet tex tfa tfc tfe tff tfl tfr tft tfx tla tlc tle tlf tll tlr tlt tlx tra trc tre trf trl trr trt trx tta ttc tte ttf ttl ttr ttt ttx txe txf txl txt xaa xac xaf xal xar xat xcf xcl xcr xcx xee xel xer xet xex xfa xfe xfl xft xfx xla xlf xlr xlt xrc xrf xrt xrx xtc xtf xtr xtx xxl xxx