-al -ol a-a a-b aaa aab aae aal aao aap aax ab- aba abb abe abl abo abp abx aea aeb aee ael aeo aep aex al- ala alb ale all alo alp alx aoa aob aoe aol aoo aop aox ap- apa apb ape apl apo app apx ax- axa axe axl axo axp axx b-p baa bab bae bal bao bap bax bba bbb bbe bbl bbo bbp bbx be- bea beb bee bel beo bep bex bla blb ble bll blo blp blx boa bob boe bol boo bop box bpa bpb bpe bpl bpo bpp bpx bxb bxl bxo bxx eaa eab eae eal eao eap eax eba ebb ebe ebl ebo ebp ebx eea eeb eee eel eeo eep eex ela elb ele ell elo elp elx eo- eoa eob eoe eol eoo eop ep- epa epb epe epl epo epp epx ex- exa exe exl exo exp exx l-p la- laa lab lae lal lao lap lax lba lbb lbe lbl lbo lbp lbx lea leb lee lel leo lep lex lla llb lle lll llo llp loa lob loe lol loo lop lox lpa lpb lpe lpl lpo lpp lpx lxo lxx oaa oab oae oal oao oap oax ob- oba obb obe obl obo obp obx oea oeb oee oel oeo oep oex ola olb ole oll olo olp oo- ooa oob ool ooo oop oox op- opa opb ope opl opo opp opx ox- oxa oxb oxo oxx p-p paa pab pae pal pao pap pax pba pbb pbe pbl pbo pbp pbx pea peb pee pel peo pep pex pla plb ple pll plo plp plx poa pob poe pol poo pop pox ppa ppb ppe ppl ppo ppp ppx pxe pxl xaa xal xap xbe xbl xbx xee xel xep xex xla xlb xoa xoo xop xox xpa xpb xpe xpl xpo xpp xxl xxo xxp xxx