-al -er -ol a-a a-b aaa aab aae aal aao aap aar aav ab- aba abb abe abl abo abp abr abv aea aeb aee ael aeo aep aer aev al- ala alb ale all alo alp alr alv aoa aob aoe aol aoo aop aor aov ap- apa apb ape apl apo app apr apv ar- ara arb are arl aro arp arr arv av- ava avb ave avl avo avp avr b-p baa bab bae bal bao bap bar bav bba bbb bbe bbl bbo bbp bbr be- bea beb bee bel beo bep ber bev bla blb ble bll blo blp blr blv boa bob boe bol boo bop bor bov bpa bpb bpe bpl bpo bpp bpr bpv bra brb bre brl bro brp brr brv bva bvb bve bvl bvo bvp bvr bvv eaa eab eae eal eao eap ear eav eba ebb ebe ebl ebo ebp ebr ebv eea eeb eee eel eeo eep eer eev ela elb ele ell elo elp elr elv eo- eoa eob eoe eol eoo eop eor ep- epa epb epe epl epo epp epr era erb ere erl ero erp err erv eva evb eve evl evo evp evr evv l-p la- laa lab lae lal lao lap lar lav lba lbb lbe lbl lbo lbp lbr lbv lea leb lee lel leo lep ler lev lla llb lle lll llo llp llr llv loa lob loe lol loo lop lor lov lpa lpb lpe lpl lpo lpp lpr lpv lra lrb lro lrp lrr lrv lva lvb lve lvl lvp lvr lvv oaa oab oae oal oao oap oar oav ob- oba obb obe obl obo obp obr obv oea oeb oee oel oeo oep oer ola olb ole oll olo olp oo- ooa oob ool ooo oop oor oov op- opa opb ope opl opo opp opr opv or- ora orb ore orl oro orp orr orv ov- ova ovb ove ovl ovo ovp ovv p-p paa pab pae pal pao pap par pav pba pbb pbe pbl pbo pbp pbr pea peb pee pel peo pep per pev pla plb ple pll plo plp plr plv poa pob poe pol poo pop por pov ppa ppb ppe ppl ppo ppp ppr ppv pra prb pre prl pro prp prr prv pva pvb pve pvl pvo pvp pvr pvv ra- raa rab rae ral rao rap rar rav rba rbb rbe rbl rbo rbp rbr re- rea reb ree rel reo rep rer rev rla rle rll rlo rlp rlr roa rob roe rol roo rop ror rov rpa rpb rpe rpl rpo rpp rpr rpv rra rrb rrl rrp rrr rva rvb rve rvl rvo rvp rvr rvv v-a v-e vaa vab vae val vao vap var vav vba vbl vbo vbr vbv vea veb vee vel veo vep ver vl- vla vlb vle vll vlo vlp vlv voa vob voe vol voo vop vor vov vpa vpb vpe vpl vpo vpp vpr vra vrb vre vrp vrr vva vvb vvo vvr vvv