-al -er -ol a-a a-b aaa aab aae aal aao aap aar aax ab- aba abb abe abl abo abp abr abx aea aeb aee ael aeo aep aer aex al- ala alb ale all alo alp alr alx aoa aob aoe aol aoo aop aor aox ap- apa apb ape apl apo app apr apx ar- ara arb are arl aro arp arr arx ax- axa axe axl axo axp axr axx b-p baa bab bae bal bao bap bar bax bba bbb bbe bbl bbo bbp bbr bbx be- bea beb bee bel beo bep ber bex bla blb ble bll blo blp blr blx boa bob boe bol boo bop bor box bpa bpb bpe bpl bpo bpp bpr bpx bra brb bre brl bro brp brr brx bxb bxl bxo bxx eaa eab eae eal eao eap ear eax eba ebb ebe ebl ebo ebp ebr ebx eea eeb eee eel eeo eep eer eex ela elb ele ell elo elp elr elx eo- eoa eob eoe eol eoo eop eor ep- epa epb epe epl epo epp epr epx era erb ere erl ero erp err ex- exa exe exl exo exp exr exx l-p la- laa lab lae lal lao lap lar lax lba lbb lbe lbl lbo lbp lbr lbx lea leb lee lel leo lep ler lex lla llb lle lll llo llp llr loa lob loe lol loo lop lor lox lpa lpb lpe lpl lpo lpp lpr lpx lra lrb lro lrp lrr lxo lxr lxx oaa oab oae oal oao oap oar oax ob- oba obb obe obl obo obp obr obx oea oeb oee oel oeo oep oer oex ola olb ole oll olo olp oo- ooa oob ool ooo oop oor oox op- opa opb ope opl opo opp opr opx or- ora orb ore orl oro orp orr orx ox- oxa oxb oxo oxx p-p paa pab pae pal pao pap par pax pba pbb pbe pbl pbo pbp pbr pbx pea peb pee pel peo pep per pex pla plb ple pll plo plp plr plx poa pob poe pol poo pop por pox ppa ppb ppe ppl ppo ppp ppr ppx pra prb pre prl pro prp prr prx pxe pxl pxr ra- raa rab rae ral rao rap rar rax rba rbb rbe rbl rbo rbp rbr rbx re- rea reb ree rel reo rep rer rex rla rle rll rlo rlp rlr roa rob roe rol roo rop ror rox rpa rpb rpe rpl rpo rpp rpr rpx rra rrb rrl rrp rrr rxp rxr xaa xal xap xar xbe xbl xbr xbx xee xel xep xer xex xla xlb xlr xoa xoo xop xor xox xpa xpb xpe xpl xpo xpp xrx xxl xxo xxp xxx