-er bbb bbe bbi bbm bbr bbt be- beb bee bei bem ber bet bi- bib bie bii bim bir bit bmb bme bmi bmm bmr bmt brb bre bri brm brr brt btb bte bti btm btr btt ebb ebe ebi ebm ebr ebt eeb eee eem eer eet eib eie eii eim eir eit em- emb eme emi emm emr emt erb ere eri erm err ert etb ete eti etm etr ett ibb ibe ibi ibm ibr ibt ie- iee iei iem ier iet iib iie iii iim iir iit im- imb ime imi imm imt ir- irb ire iri irm irr irt itb ite iti itm itt m-r mbb mbe mbi mbm mbr mbt meb mee mei mem mer met mi- mib mie mii mim mir mit mmb mme mmi mmm mmr mmt mrb mre mri mrm mrr mrt mtb mte mti mtm mtr mtt rbb rbe rbi rbm rbr rbt re- reb ree rei rem rer ret rib rie rii rim rir rit rmb rme rmi rmm rmr rmt rrb rri rrm rrr rrt rtb rte rti rtm rtr rtt tbb tbe tbi tbm tbr tbt te- teb tee tei tem ter tet tib tie tii tim tir tit tmb tme tmi tmm tmr tmt trb tre tri trm trr trt ttb tte tti ttm ttr ttt