bbb bbi bbk bbl bbr bi- bib bii bik bil bir bkb bkk bkl bkr blb bli blk bll blr brb bri brk brl brr ibb ibi ibk ibl ibr iib iii iil iir ikb iki ikk ikl ikr il- ilb ili ilk ill ilr ir- irb iri irk irl irr kbb kbi kbk kbl kbr kib kii kik kil kir kkb kki kkk kkl kkr kl- klb kli klr kri krk krl krr lbb lbi lbk lbl lbr lib lii lik lil lir lkb lkl lkr llb lli llk lll llr lrb lri lrk lrr rbb rbi rbk rbl rbr rib rii rik ril rir rkb rkk rli rll rlr rrb rri rrk rrl rrr