-al -er -ol a-a a-c aaa aac aae aal aao aar aau aax ac- aca acc ace acl aco acr acu acx aea aec aee ael aeo aer aeu aex al- ala alc ale all alo alr alu alx aoa aoc aoe aol aoo aor aou aox ar- ara arc are arl aro arr aru arx au- aua auc aue aul auo aur aux ax- axa axe axl axo axr axx c-- caa cac cae cal cao car cau cax cca ccc cce ccl cco ccr ccu ccx ce- cea cec cee cel ceo cer ceu cex cl- cla clc cle cll clo clr clu clx co- coa coc coe col coo cor cou cox cra crc cre crl cro crr cru crx cua cuc cue cul cuo cur cuu cxc cxl cxo cxr cxx eaa eac eae eal eao ear eau eax ec- eca ecc ece ecl eco ecr ecu ecx eea eec eee eel eeo eer eex ela elc ele ell elo elr elu elx eo- eoa eoc eoe eol eoo eor eou era erc ere erl ero err eru eu- eua euc eue eul eur eux ex- exa exc exe exl exo exr exu exx la- laa lac lae lal lao lar lau lax lca lcc lce lcl lco lcr lcu lcx lea lec lee lel leo ler leu lex lla llc lle lll llo llr llu loa loc loe lol loo lor lou lox lra lrc lro lrr lru lua luc lue lul luo lur luu lux lxc lxo lxr lxx oaa oac oae oal oao oar oau oax oc- oca occ ocl oco ocr ocu ocx oea oec oee oel oeo oer oex ola olc ole oll olo olu oo- ooa ooc ool ooo oor oox or- ora orc ore orl oro orr oru orx ou- oua ouc oue oul ouo our ox- oxa oxc oxo oxx ra- raa rac rae ral rao rar rau rax rca rcc rce rcl rco rcr rcu rcx re- rea rec ree rel reo rer reu rex rla rlc rle rll rlo rlr rlu roa roc roe rol roo ror rou rox rra rrc rrl rrr rru rua ruc rue ruo rur ruu rux rxr ua- uaa uac uae ual uao uar uau uca ucc uce ucl uco ucr ucu uea uec uee uel uer ula ulc ule ull ulo ulr ulu uoa uoc uoe uol uoo uor uox ur- ura urc ure url uro urr uru urx uua uuc uue uur uuu uxc uxo uxr uxu xaa xac xal xar xau xcl xcr xcx xee xel xer xeu xex xla xlr xoa xoc xoo xor xox xrc xrx xue xul xxl xxo xxx