-al -er -ol a-a a-c aaa aac aae aal aao aar aax ac- aca acc ace acl aco acr acx aea aec aee ael aeo aer aex al- ala alc ale all alo alr alx aoa aoc aoe aol aoo aor aox ar- ara arc are arl aro arr arx ax- axa axe axl axo axr axx c-- caa cac cae cal cao car cax cca ccc cce ccl cco ccr ccx ce- cea cec cee cel ceo cer cex cl- cla clc cle cll clo clr clx co- coa coc coe col coo cor cox cra crc cre crl cro crr crx cxc cxl cxo cxr cxx eaa eac eae eal eao ear eax ec- eca ecc ece ecl eco ecr ecx eea eec eee eel eeo eer eex ela elc ele ell elo elr elx eo- eoa eoc eoe eol eoo eor era erc ere erl ero err ex- exa exc exe exl exo exr exx la- laa lac lae lal lao lar lax lca lcc lce lcl lco lcr lcx lea lec lee lel leo ler lex lla llc lle lll llo llr loa loc loe lol loo lor lox lra lrc lro lrr lxc lxo lxr lxx oaa oac oae oal oao oar oax oc- oca occ ocl oco ocr ocx oea oec oee oel oeo oer oex ola olc ole oll olo oo- ooa ooc ool ooo oor oox or- ora orc ore orl oro orr orx ox- oxa oxc oxo oxx ra- raa rac rae ral rao rar rax rca rcc rce rcl rco rcr rcx re- rea rec ree rel reo rer rex rla rlc rle rll rlo rlr roa roc roe rol roo ror rox rra rrc rrl rrr rxr xaa xac xal xar xcl xcr xcx xee xel xer xex xla xlr xoa xoc xoo xor xox xrc xrx xxl xxo xxx