-al -er a-a a-b aaa aab aae aak aal aan aap aar ab- aba abb abe abk abl abn abp abr aea aeb aee aek ael aen aep aer aka akb ake akk akl akn akp akr al- ala alb ale alk all aln alp alr an- ana anb ane ank anl ann anp anr ap- apa apb ape apk apl apn app apr ar- ara arb are ark arl arn arp arr b-p baa bab bae bak bal ban bap bar bba bbb bbe bbk bbl bbn bbp bbr be- bea beb bee bek bel ben bep ber bka bkb bke bkk bkl bkn bkp bkr bla blb ble blk bll bln blp blr bna bnb bne bnk bnl bnn bnp bnr bpa bpb bpe bpl bpn bpp bpr bra brb bre brk brl brn brp brr eaa eab eae eak eal ean eap ear eba ebb ebe ebk ebl ebn ebp ebr eea eeb eee eek eel een eep eer eka ekb eke ekl ekp ekr ela elb ele elk ell eln elp elr en- ena enb ene enk enl enn enp enr ep- epa epb epe epl epn epp epr era erb ere erk erl ern erp err ka- kaa kab kae kak kal kan kap kar kba kbb kbe kbk kbl kbn kbp kbr ke- kea keb kee kek kel ken kep ker kkb kke kkk kkl kkn kkp kkr kl- kla klb klr kn- kna kne knk knl knn knp knr kpa kpe kpk kpl kpn kpp kpr kra krk krl krn krp krr l-p la- laa lab lae lak lal lan lap lar lba lbb lbe lbk lbl lbp lbr lea leb lee lek lel len lep ler lka lkb lkl lkp lkr lla llb lle llk lll lln llp llr lna lnb lne lnk lnl lnn lnp lnr lpa lpb lpe lpk lpl lpn lpp lpr lra lrb lrk lrn lrp lrr naa nab nae nak nal nan nap nar nba nbb nbe nbk nbl nbn nbp nbr ne- nea neb nee nek nel nen nep ner nka nke nkk nkn nkp nkr nla nlb nle nlk nll nln nlp nlr nna nnb nne nnk nnl nnn nnp npa npb npe npl npn npp npr nra nrb nre nrk nrl nrn nrp nrr p-p paa pab pae pak pal pan pap par pba pbb pbe pbk pbl pbn pbp pbr pea peb pee pek pel pen pep per pka pkb pke pkl pkn pkp pkr pla plb ple plk pll pln plp plr pn- pna pnb pne pnk pnl pnn pnp pnr ppa ppb ppe ppk ppl ppn ppp ppr pra prb pre prk prl prn prp prr ra- raa rab rae rak ral ran rap rar rba rbb rbe rbk rbl rbn rbp rbr re- rea reb ree rek rel ren rep rer rkb rke rkk rkp rla rle rll rln rlp rlr rna rnb rnn rnp rnr rpa rpb rpe rpk rpl rpn rpp rpr rra rrb rrk rrl rrn rrp rrr