-al -er -ol a-a a-b aaa aab aae aal aan aao aap aar ab- aba abb abe abl abn abo abp abr aea aeb aee ael aen aeo aep aer al- ala alb ale all aln alo alp alr an- ana anb ane anl ann ano anp anr aoa aob aoe aol aon aoo aop aor ap- apa apb ape apl apn apo app apr ar- ara arb are arl arn aro arp arr b-p baa bab bae bal ban bao bap bar bba bbb bbe bbl bbn bbo bbp bbr be- bea beb bee bel ben beo bep ber bla blb ble bll bln blo blp blr bna bnb bne bnl bnn bno bnp bnr boa bob boe bol bon boo bop bor bpa bpb bpe bpl bpn bpo bpp bpr bra brb bre brl brn bro brp brr eaa eab eae eal ean eao eap ear eba ebb ebe ebl ebn ebo ebp ebr eea eeb eee eel een eeo eep eer ela elb ele ell eln elo elp elr en- ena enb ene enl enn eno enp enr eo- eoa eob eoe eol eon eoo eop eor ep- epa epb epe epl epn epo epp epr era erb ere erl ern ero erp err l-p la- laa lab lae lal lan lao lap lar lba lbb lbe lbl lbo lbp lbr lea leb lee lel len leo lep ler lla llb lle lll lln llo llp llr lna lnb lne lnl lnn lno lnp lnr loa lob loe lol lon loo lop lor lpa lpb lpe lpl lpn lpo lpp lpr lra lrb lrn lro lrp lrr naa nab nae nal nan nao nap nar nba nbb nbe nbl nbn nbo nbp nbr ne- nea neb nee nel nen neo nep ner nla nlb nle nll nln nlo nlp nlr nna nnb nne nnl nnn nno nnp no- noa nob noe nol non noo nop nor npa npb npe npl npn npo npp npr nra nrb nre nrl nrn nro nrp nrr oaa oab oae oal oan oao oap oar ob- oba obb obe obl obn obo obp obr oea oeb oee oel oen oeo oep oer ola olb ole oll oln olo olp on- ona onb one onl onn ono onp onr oo- ooa oob ool oon ooo oop oor op- opa opb ope opl opn opo opp opr or- ora orb ore orl orn oro orp orr p-p paa pab pae pal pan pao pap par pba pbb pbe pbl pbn pbo pbp pbr pea peb pee pel pen peo pep per pla plb ple pll pln plo plp plr pn- pna pnb pne pnl pnn pno pnp pnr poa pob poe pol pon poo pop por ppa ppb ppe ppl ppn ppo ppp ppr pra prb pre prl prn pro prp prr ra- raa rab rae ral ran rao rap rar rba rbb rbe rbl rbn rbo rbp rbr re- rea reb ree rel ren reo rep rer rla rle rll rln rlo rlp rlr rna rnb rnn rno rnp rnr roa rob roe rol ron roo rop ror rpa rpb rpe rpl rpn rpo rpp rpr rra rrb rrl rrn rrp rrr