-al -er a-a a-b aaa aab aad aae aak aal aar ab- aba abb abd abe abk abl abr ad- ada adb add ade adk adl adr aea aeb aed aee aek ael aer aka akb akd ake akk akl akr al- ala alb ald ale alk all alr ar- ara arb ard are ark arl arr baa bab bad bae bak bal bar bba bbb bbd bbe bbk bbl bbr bda bdb bdd bde bdk bdl bdr be- bea beb bed bee bek bel ber bka bkb bke bkk bkl bkr bla blb bld ble blk bll blr bra brb brd bre brk brl brr daa dab dad dae dak dal dar dba dbb dbd dbe dbk dbl dbr dda ddb ddd dde ddk ddl ddr de- dea deb ded dee dek del der dka dkb dke dkk dkl dkr dl- dla dlb dld dle dlk dll dlr dra drb drd dre drk drl drr eaa eab ead eae eak eal ear eba ebb ebd ebe ebk ebl ebr ed- eda edb edd ede edk edl edr eea eeb eed eee eek eel eer eka ekb ekd eke ekl ekr ela elb eld ele elk ell elr era erb erd ere erk erl err ka- kaa kab kad kae kak kal kar kba kbb kbd kbe kbk kbl kbr kda kdb kde kdk kdl kdr ke- kea keb ked kee kek kel ker kkb kke kkk kkl kkr kl- kla klb kld klr kra krd krk krl krr la- laa lab lad lae lak lal lar lba lbb lbd lbe lbk lbl lbr lda ldb ldd lde ldk ldl ldr lea leb led lee lek lel ler lka lkb lkl lkr lla llb lld lle llk lll llr lra lrb lrd lrk lrr ra- raa rab rad rae rak ral rar rba rbb rbd rbe rbk rbl rbr rda rdb rdd rde rdl rdr re- rea reb red ree rek rel rer rkb rke rkk rla rld rle rll rlr rra rrb rrd rrk rrl rrr