-al -er a-a a-b a-t aaa aab aae aak aal aan aar aat ab- aba abb abe abk abl abn abr abt aea aeb aee aek ael aen aer aet aka akb ake akk akl akn akr al- ala alb ale alk all aln alr alt an- ana anb ane ank anl ann anr ant ar- ara arb are ark arl arn arr art at- ata atb ate atl atn atr att baa bab bae bak bal ban bar bat bba bbb bbe bbk bbl bbn bbr bbt be- bea beb bee bek bel ben ber bet bka bkb bke bkk bkl bkn bkr bkt bla blb ble blk bll bln blr blt bna bnb bne bnk bnl bnn bnr bnt bra brb bre brk brl brn brr brt bta btb bte btk btl btn btr btt eaa eab eae eak eal ean ear eat eba ebb ebe ebk ebl ebn ebr ebt eea eeb eee eek eel een eer eet eka ekb eke ekl ekr ekt ela elb ele elk ell eln elr elt en- ena enb ene enk enl enn enr ent era erb ere erk erl ern err ert eta etb ete etk etl etn etr ett k-t ka- kaa kab kae kak kal kan kar kat kba kbb kbe kbk kbl kbn kbr ke- kea keb kee kek kel ken ker ket kkb kke kkk kkl kkn kkr kkt kl- kla klb klr klt kn- kna kne knk knl knn knr knt kra krk krl krn krr krt kta ktb kte ktk ktl ktn ktr ktt la- laa lab lae lak lal lan lar lat lba lbb lbe lbk lbl lbr lbt lea leb lee lek lel len ler let lka lkb lkl lkr lkt lla llb lle llk lll lln llr llt lna lnb lne lnk lnl lnn lnr lnt lra lrb lrk lrn lrr lrt lta ltb lte ltk ltl ltr ltt naa nab nae nak nal nan nar nat nba nbb nbe nbk nbl nbn nbr nbt ne- nea neb nee nek nel nen ner net nka nke nkk nkn nkr nkt nla nlb nle nlk nll nln nlr nlt nna nnb nne nnk nnl nnn nnt nra nrb nre nrk nrl nrn nrr nrt nta ntb nte ntk ntn ntr ntt ra- raa rab rae rak ral ran rar rat rba rbb rbe rbk rbl rbn rbr rbt re- rea reb ree rek rel ren rer ret rkb rke rkk rkt rla rle rll rln rlr rlt rna rnb rnn rnr rnt rra rrb rrk rrl rrn rrr rrt rta rtb rte rtk rtl rtn rtr rtt taa tab tae tak tal tan tar tat tba tbb tbe tbk tbl tbn tbr tbt te- tea teb tee tek tel ten ter tet tka tkb tke tkk tkl tkr tkt tla tle tlk tll tln tlr tlt tna tnb tne tnk tnl tnn tnr tnt tra trb tre trk trl trn trr trt tta ttb tte ttk ttl ttn ttr ttt