-al -er -ol a-a a-b aaa aab aae aaf aal aao aap aar ab- aba abb abe abf abl abo abp abr aea aeb aee aef ael aeo aep aer af- afa afb afe aff afl afo afp afr al- ala alb ale alf all alo alp alr aoa aob aoe aof aol aoo aop aor ap- apa apb ape apf apl apo app apr ar- ara arb are arf arl aro arp arr b-p baa bab bae baf bal bao bap bar bba bbb bbe bbf bbl bbo bbp bbr be- bea beb bee bef bel beo bep ber bfa bfb bfe bff bfl bfo bfp bfr bla blb ble blf bll blo blp blr boa bob boe bof bol boo bop bor bpa bpb bpe bpf bpl bpo bpp bpr bra brb bre brf brl bro brp brr eaa eab eae eaf eal eao eap ear eba ebb ebe ebf ebl ebo ebp ebr eea eeb eee eef eel eeo eep eer ef- efa efb efe eff efl efo efp efr ela elb ele elf ell elo elp elr eo- eoa eob eoe eof eol eoo eop eor ep- epa epb epe epf epl epo epp epr era erb ere erf erl ero erp err faa fab fae faf fal fao fap far fba fbb fbe fbf fbl fbo fbp fbr fea feb fee fef fel feo fep fer ffa ffe fff ffl ffo ffp ffr fla flb fle flf fll flo flp flr foa fob foe fof fol foo fop for fpa fpb fpe fpl fpo fpp fpr fra frb fre frf frl fro frp frr l-p la- laa lab lae laf lal lao lap lar lba lbb lbe lbf lbl lbo lbp lbr lea leb lee lef lel leo lep ler lfa lfb lfe lff lfl lfo lfp lfr lla llb lle llf lll llo llp llr loa lob loe lof lol loo lop lor lpa lpb lpe lpf lpl lpo lpp lpr lra lrb lrf lro lrp lrr oaa oab oae oaf oal oao oap oar ob- oba obb obe obf obl obo obp obr oea oeb oee oef oel oeo oep oer of- ofa ofb ofe off ofl ofo ofp ofr ola olb ole olf oll olo olp oo- ooa oob oof ool ooo oop oor op- opa opb ope opf opl opo opp opr or- ora orb ore orf orl oro orp orr p-p paa pab pae paf pal pao pap par pba pbb pbe pbf pbl pbo pbp pbr pea peb pee pef pel peo pep per pfa pfb pfe pff pfl pfo pfp pfr pla plb ple plf pll plo plp plr poa pob poe pof pol poo pop por ppa ppb ppe ppf ppl ppo ppp ppr pra prb pre prf prl pro prp prr ra- raa rab rae raf ral rao rap rar rba rbb rbe rbf rbl rbo rbp rbr re- rea reb ree ref rel reo rep rer rfa rfb rfe rff rfl rfo rfp rfr rla rle rlf rll rlo rlp rlr roa rob roe rof rol roo rop ror rpa rpb rpe rpf rpl rpo rpp rpr rra rrb rrf rrl rrp rrr