-al -er -ol a-a a-c aaa aac aae aal aao aap aar aax ac- aca acc ace acl aco acp acr acx aea aec aee ael aeo aep aer aex al- ala alc ale all alo alp alr alx aoa aoc aoe aol aoo aop aor aox ap- apa apc ape apl apo app apr apx ar- ara arc are arl aro arp arr arx ax- axa axe axl axo axp axr axx c-- caa cac cae cal cao cap car cax cca ccc cce ccl cco ccp ccr ccx ce- cea cec cee cel ceo cep cer cex cl- cla clc cle cll clo clp clr clx co- coa coc coe col coo cop cor cox cpa cpc cpe cpl cpo cpp cpr cpx cra crc cre crl cro crp crr crx cxc cxl cxo cxp cxr cxx eaa eac eae eal eao eap ear eax ec- eca ecc ece ecl eco ecr ecx eea eec eee eel eeo eep eer eex ela elc ele ell elo elp elr elx eo- eoa eoc eoe eol eoo eop eor ep- epa epc epe epl epo epp epr epx era erc ere erl ero erp err ex- exa exc exe exl exo exp exr exx l-p la- laa lac lae lal lao lap lar lax lca lcc lce lcl lco lcp lcr lcx lea lec lee lel leo lep ler lex lla llc lle lll llo llp llr loa loc loe lol loo lop lor lox lpa lpc lpe lpl lpo lpp lpr lpx lra lrc lro lrp lrr lxc lxo lxr lxx oaa oac oae oal oao oap oar oax oc- oca occ ocl oco ocp ocr ocx oea oec oee oel oeo oep oer oex ola olc ole oll olo olp oo- ooa ooc ool ooo oop oor oox op- opa opc ope opl opo opp opr opx or- ora orc ore orl oro orp orr orx ox- oxa oxc oxo oxx p-p paa pac pae pal pao pap par pax pca pcc pce pcl pco pcp pcr pcx pea pec pee pel peo pep per pex pla plc ple pll plo plp plr plx poa poc poe pol poo pop por pox ppa ppc ppe ppl ppo ppp ppr ppx pra prc pre prl pro prp prr prx pxc pxe pxl pxr ra- raa rac rae ral rao rap rar rax rca rcc rce rcl rco rcp rcr rcx re- rea rec ree rel reo rep rer rex rla rlc rle rll rlo rlp rlr roa roc roe rol roo rop ror rox rpa rpc rpe rpl rpo rpp rpr rpx rra rrc rrl rrp rrr rxp rxr xaa xac xal xap xar xcl xcp xcr xcx xee xel xep xer xex xla xlr xoa xoc xoo xop xor xox xpa xpc xpe xpl xpo xpp xrc xrx xxl xxo xxp xxx