-al -er -ol a-a a-b aaa aab aae aak aal aan aao aap aar ab- aba abb abe abk abl abn abo abp abr aea aeb aee aek ael aen aeo aep aer aka akb ake akk akl akn ako akp akr al- ala alb ale alk all aln alo alp alr an- ana anb ane ank anl ann ano anp anr aoa aob aoe aok aol aon aoo aop aor ap- apa apb ape apk apl apn apo app apr ar- ara arb are ark arl arn aro arp arr b-p baa bab bae bak bal ban bao bap bar bba bbb bbe bbk bbl bbn bbo bbp bbr be- bea beb bee bek bel ben beo bep ber bka bkb bke bkk bkl bkn bko bkp bkr bla blb ble blk bll bln blo blp blr bna bnb bne bnk bnl bnn bno bnp bnr boa bob boe bok bol bon boo bop bor bpa bpb bpe bpl bpn bpo bpp bpr bra brb bre brk brl brn bro brp brr eaa eab eae eak eal ean eao eap ear eba ebb ebe ebk ebl ebn ebo ebp ebr eea eeb eee eek eel een eeo eep eer eka ekb eke ekl eko ekp ekr ela elb ele elk ell eln elo elp elr en- ena enb ene enk enl enn eno enp enr eo- eoa eob eoe eok eol eon eoo eop eor ep- epa epb epe epl epn epo epp epr era erb ere erk erl ern ero erp err ka- kaa kab kae kak kal kan kao kap kar kba kbb kbe kbk kbl kbn kbo kbp kbr ke- kea keb kee kek kel ken keo kep ker kkb kke kkk kkl kkn kkp kkr kl- kla klb klo klr kn- kna kne knk knl knn kno knp knr koa kob koe kok kol kon koo kop kor kpa kpe kpk kpl kpn kpo kpp kpr kra krk krl krn kro krp krr l-p la- laa lab lae lak lal lan lao lap lar lba lbb lbe lbk lbl lbo lbp lbr lea leb lee lek lel len leo lep ler lka lkb lkl lkp lkr lla llb lle llk lll lln llo llp llr lna lnb lne lnk lnl lnn lno lnp lnr loa lob loe lok lol lon loo lop lor lpa lpb lpe lpk lpl lpn lpo lpp lpr lra lrb lrk lrn lro lrp lrr naa nab nae nak nal nan nao nap nar nba nbb nbe nbk nbl nbn nbo nbp nbr ne- nea neb nee nek nel nen neo nep ner nka nke nkk nkn nko nkp nkr nla nlb nle nlk nll nln nlo nlp nlr nna nnb nne nnk nnl nnn nno nnp no- noa nob noe nok nol non noo nop nor npa npb npe npl npn npo npp npr nra nrb nre nrk nrl nrn nro nrp nrr oaa oab oae oak oal oan oao oap oar ob- oba obb obe obk obl obn obo obp obr oea oeb oee oel oen oeo oep oer oka okb oke okk okl oko okp okr ola olb ole olk oll oln olo olp on- ona onb one onk onl onn ono onp onr oo- ooa oob ook ool oon ooo oop oor op- opa opb ope opk opl opn opo opp opr or- ora orb ore ork orl orn oro orp orr p-p paa pab pae pak pal pan pao pap par pba pbb pbe pbk pbl pbn pbo pbp pbr pea peb pee pek pel pen peo pep per pka pkb pke pkl pkn pko pkp pkr pla plb ple plk pll pln plo plp plr pn- pna pnb pne pnk pnl pnn pno pnp pnr poa pob poe pok pol pon poo pop por ppa ppb ppe ppk ppl ppn ppo ppp ppr pra prb pre prk prl prn pro prp prr ra- raa rab rae rak ral ran rao rap rar rba rbb rbe rbk rbl rbn rbo rbp rbr re- rea reb ree rek rel ren reo rep rer rkb rke rkk rko rkp rla rle rll rln rlo rlp rlr rna rnb rnn rno rnp rnr roa rob roe rok rol ron roo rop ror rpa rpb rpe rpk rpl rpn rpo rpp rpr rra rrb rrk rrl rrn rrp rrr