-al -er a-a a-b aaa aab aae aak aal aan aar ab- aba abb abe abk abl abn abr aea aeb aee aek ael aen aer aka akb ake akk akl akn akr al- ala alb ale alk all aln alr an- ana anb ane ank anl ann anr ar- ara arb are ark arl arn arr baa bab bae bak bal ban bar bba bbb bbe bbk bbl bbn bbr be- bea beb bee bek bel ben ber bka bkb bke bkk bkl bkn bkr bla blb ble blk bll bln blr bna bnb bne bnk bnl bnn bnr bra brb bre brk brl brn brr eaa eab eae eak eal ean ear eba ebb ebe ebk ebl ebn ebr eea eeb eee eek eel een eer eka ekb eke ekl ekr ela elb ele elk ell eln elr en- ena enb ene enk enl enn enr era erb ere erk erl ern err ka- kaa kab kae kak kal kan kar kba kbb kbe kbk kbl kbn kbr ke- kea keb kee kek kel ken ker kkb kke kkk kkl kkn kkr kl- kla klb klr kn- kna kne knk knl knn knr kra krk krl krn krr la- laa lab lae lak lal lan lar lba lbb lbe lbk lbl lbr lea leb lee lek lel len ler lka lkb lkl lkr lla llb lle llk lll lln llr lna lnb lne lnk lnl lnn lnr lra lrb lrk lrn lrr naa nab nae nak nal nan nar nba nbb nbe nbk nbl nbn nbr ne- nea neb nee nek nel nen ner nka nke nkk nkn nkr nla nlb nle nlk nll nln nlr nna nnb nne nnk nnl nnn nra nrb nre nrk nrl nrn nrr ra- raa rab rae rak ral ran rar rba rbb rbe rbk rbl rbn rbr re- rea reb ree rek rel ren rer rkb rke rkk rla rle rll rln rlr rna rnb rnn rnr rra rrb rrk rrl rrn rrr