-al -er a-a a-c aaa aac aae aal aar aax ac- aca acc ace acl acr acx aea aec aee ael aer aex al- ala alc ale all alr alx ar- ara arc are arl arr arx ax- axa axe axl axr axx c-- caa cac cae cal car cax cca ccc cce ccl ccr ccx ce- cea cec cee cel cer cex cl- cla clc cle cll clr clx cra crc cre crl crr crx cxc cxl cxr cxx eaa eac eae eal ear eax ec- eca ecc ece ecl ecr ecx eea eec eee eel eer eex ela elc ele ell elr elx era erc ere erl err ex- exa exc exe exl exr exx la- laa lac lae lal lar lax lca lcc lce lcl lcr lcx lea lec lee lel ler lex lla llc lle lll llr lra lrc lrr lxc lxr lxx ra- raa rac rae ral rar rax rca rcc rce rcl rcr rcx re- rea rec ree rel rer rex rla rlc rle rll rlr rra rrc rrl rrr rxr xaa xac xal xar xcl xcr xcx xee xel xer xex xla xlr xrc xrx xxl xxx