-er bbb bbe bbi bbk bbm bbo bbr bbt be- beb bee bei bek bem beo ber bet bi- bib bie bii bik bim bio bir bit bkb bke bkk bkm bko bkr bkt bmb bme bmi bmk bmm bmo bmr bmt bob boe boi bok bom boo bor bot brb bre bri brk brm bro brr brt btb bte bti btk btm bto btr btt ebb ebe ebi ebk ebm ebo ebr ebt eeb eee eek eem eeo eer eet eib eie eii eik eim eio eir eit ekb eke eki eko ekr ekt em- emb eme emi emk emm emo emr emt eo- eob eoe eoi eok eom eoo eor eot erb ere eri erk erm ero err ert etb ete eti etk etm eto etr ett ibb ibe ibi ibk ibm ibo ibr ibt ie- iee iei iek iem ier iet iib iie iii iim iio iir iit ikb ike iki ikk iko ikr ikt im- imb ime imi imm imo imt io- iob ioe ioi iom ioo ior iot ir- irb ire iri irk irm iro irr irt itb ite iti itk itm ito itt k-t kbb kbe kbi kbk kbm kbo kbr ke- keb kee kei kek kem keo ker ket kib kie kii kik kim kio kir kit kkb kke kki kkk kkm kkr kkt kmb kme kmi kmk kmm kmo kmt kob koe koi kok kom koo kor kot kri krk kro krr krt ktb kte ktk ktm kto ktr ktt m-o m-r mbb mbe mbi mbk mbm mbo mbr mbt meb mee mei mek mem meo mer met mi- mib mie mii mik mim mio mir mit mkb mke mkk mkm mko mkr mkt mmb mme mmi mmk mmm mmo mmr mmt mob moe moi mok mom moo mor mot mrb mre mri mrk mrm mro mrr mrt mtb mte mti mtk mtm mto mtr mtt o-i ob- obb obe obi obk obm obo obr obt oeb oee oei oem oeo oer oet oib oie oii oik oim oio oir oit okb oke oki okk oko okr om- omb ome omi omm omo omr omt oo- oob ooi ook oom ooo oor oot or- orb ore ori ork orm oro orr ort ot- otb ote oti otk otm oto otr ott rbb rbe rbi rbk rbm rbo rbr rbt re- reb ree rei rek rem reo rer ret rib rie rii rik rim rio rir rit rkb rke rkk rkm rko rkt rmb rme rmi rmm rmo rmr rmt rob roe roi rok rom roo ror rot rrb rri rrk rrm rrr rrt rtb rte rti rtk rtm rto rtr rtt tbb tbe tbi tbk tbm tbo tbr tbt te- teb tee tei tek tem teo ter tet tib tie tii tik tim tio tir tit tkb tke tkk tkm tko tkr tkt tmb tme tmi tmk tmm tmo tmr tmt to- tob toe toi tok tom too tor tot trb tre tri trk trm tro trr trt ttb tte tti ttk ttm tto ttr ttt