-er bbb bbe bbi bbk bbl bbm bbr bbt be- beb bee bei bek bel bem ber bet bi- bib bie bii bik bil bim bir bit bkb bke bkk bkl bkm bkr bkt blb ble bli blk bll blm blr blt bmb bme bmi bmk bml bmm bmr bmt brb bre bri brk brl brm brr brt btb bte bti btk btl btm btr btt ebb ebe ebi ebk ebl ebm ebr ebt eeb eee eek eel eem eer eet eib eie eii eik eil eim eir eit ekb eke eki ekl ekr ekt elb ele eli elk ell elm elr elt em- emb eme emi emk eml emm emr emt erb ere eri erk erl erm err ert etb ete eti etk etl etm etr ett ibb ibe ibi ibk ibl ibm ibr ibt ie- iee iei iek iel iem ier iet iib iie iii iil iim iir iit ikb ike iki ikk ikl ikr ikt il- ilb ile ili ilk ill ilm ilr ilt im- imb ime imi iml imm imt ir- irb ire iri irk irl irm irr irt itb ite iti itk itl itm itt k-t kbb kbe kbi kbk kbl kbm kbr ke- keb kee kei kek kel kem ker ket kib kie kii kik kil kim kir kit kkb kke kki kkk kkl kkm kkr kkt kl- klb kli klm klr klt kmb kme kmi kmk kml kmm kmt kri krk krl krr krt ktb kte ktk ktl ktm ktr ktt lbb lbe lbi lbk lbl lbm lbr lbt leb lee lei lek lel lem ler let lib lie lii lik lil lim lir lit lkb lkl lkr lkt llb lle lli llk lll llm llr llt lmb lme lmi lmk lml lmm lmr lmt lrb lri lrk lrm lrr lrt ltb lte lti ltk ltl ltm ltr ltt m-r mbb mbe mbi mbk mbl mbm mbr mbt meb mee mei mek mel mem mer met mi- mib mie mii mik mil mim mir mit mkb mke mkk mkl mkm mkr mkt mlb mle mli mlk mll mlm mlr mlt mmb mme mmi mmk mml mmm mmr mmt mrb mre mri mrk mrl mrm mrr mrt mtb mte mti mtk mtl mtm mtr mtt rbb rbe rbi rbk rbl rbm rbr rbt re- reb ree rei rek rel rem rer ret rib rie rii rik ril rim rir rit rkb rke rkk rkm rkt rle rli rll rlm rlr rlt rmb rme rmi rml rmm rmr rmt rrb rri rrk rrl rrm rrr rrt rtb rte rti rtk rtl rtm rtr rtt tbb tbe tbi tbk tbl tbm tbr tbt te- teb tee tei tek tel tem ter tet tib tie tii tik til tim tir tit tkb tke tkk tkl tkm tkr tkt tle tli tlk tll tlm tlr tlt tmb tme tmi tmk tml tmm tmr tmt trb tre tri trk trl trm trr trt ttb tte tti ttk ttl ttm ttr ttt