-al a-a a-b a-t aaa aab aak aal aar aat ab- aba abb abk abl abr abt aka akb akk akl akr al- ala alb alk all alr alt ar- ara arb ark arl arr art at- ata atb atl atr att baa bab bak bal bar bat bba bbb bbk bbl bbr bbt bka bkb bkk bkl bkr bkt bla blb blk bll blr blt bra brb brk brl brr brt bta btb btk btl btr btt k-t ka- kaa kab kak kal kar kat kba kbb kbk kbl kbr kkb kkk kkl kkr kkt kl- kla klb klr klt kra krk krl krr krt kta ktb ktk ktl ktr ktt la- laa lab lak lal lar lat lba lbb lbk lbl lbr lbt lka lkb lkl lkr lkt lla llb llk lll llr llt lra lrb lrk lrr lrt lta ltb ltk ltl ltr ltt ra- raa rab rak ral rar rat rba rbb rbk rbl rbr rbt rkb rkk rkt rla rll rlr rlt rra rrb rrk rrl rrr rrt rta rtb rtk rtl rtr rtt taa tab tak tal tar tat tba tbb tbk tbl tbr tbt tka tkb tkk tkl tkr tkt tla tlk tll tlr tlt tra trb trk trl trr trt tta ttb ttk ttl ttr ttt