-al -er a-a a-c aaa aac aad aae aaf aal aar aax ac- aca acc acd ace acf acl acr acx ad- ada adc add ade adf adl adr adx aea aec aed aee aef ael aer aex af- afa afc afd afe aff afl afr afx al- ala alc ald ale alf all alr alx ar- ara arc ard are arf arl arr arx ax- axa axe axl axr axx c-- caa cac cad cae caf cal car cax cca ccc ccd cce ccf ccl ccr ccx cda cdc cdd cde cdf cdl cdr cdx ce- cea cec ced cee cef cel cer cex cfa cfc cfd cfe cff cfl cfr cfx cl- cla clc cld cle clf cll clr clx cra crc crd cre crf crl crr crx cxc cxf cxl cxr cxx daa dac dad dae daf dal dar dax dca dcc dcd dce dcf dcl dcr dcx dda ddc ddd dde ddf ddl ddr ddx de- dea dec ded dee def del der dex dfa dfc dfd dfe dff dfl dfr dfx dl- dla dlc dld dle dlf dll dlr dlx dra drc drd dre drl drr drx dxc dxd dxl dxr dxx eaa eac ead eae eaf eal ear eax ec- eca ecc ecd ece ecf ecl ecr ecx ed- eda edc edd ede edf edl edr edx eea eec eed eee eef eel eer eex ef- efa efc efd efe eff efl efr efx ela elc eld ele elf ell elr elx era erc erd ere erf erl err ex- exa exc exd exe exl exr exx faa fac fad fae faf fal far fax fca fcc fcd fce fcf fcl fcr fcx fda fdc fdd fde fdf fdl fdr fdx fea fec fed fee fef fel fer fex ffa ffc ffd ffe fff ffl ffr ffx fla flc fld fle flf fll flr flx fra frc frd fre frf frl frr fxe fxr fxx la- laa lac lad lae laf lal lar lax lca lcc lcd lce lcf lcl lcr lcx lda ldc ldd lde ldf ldl ldr lea lec led lee lef lel ler lex lfa lfc lfd lfe lff lfl lfr lfx lla llc lld lle llf lll llr lra lrc lrd lrf lrr lxc lxd lxr lxx ra- raa rac rad rae raf ral rar rax rca rcc rcd rce rcf rcl rcr rcx rda rdc rdd rde rdf rdl rdr rdx re- rea rec red ree ref rel rer rex rfa rfc rfd rfe rff rfl rfr rla rlc rld rle rlf rll rlr rra rrc rrd rrf rrl rrr rxr xaa xac xad xaf xal xar xcd xcf xcl xcr xcx xda xdc xde xdf xdr xed xee xel xer xex xfa xfe xfl xfx xla xld xlf xlr xrc xrd xrf xrx xxl xxx