bbb bbi bbm bbo bbr bbt bi- bib bii bim bio bir bit bmb bmi bmm bmo bmr bmt bob boi bom boo bor bot brb bri brm bro brr brt btb bti btm bto btr btt ibb ibi ibm ibo ibr ibt iib iii iim iio iir iit im- imb imi imm imo imt io- iob ioi iom ioo ior iot ir- irb iri irm iro irr irt itb iti itm ito itt m-o m-r mbb mbi mbm mbo mbr mbt mi- mib mii mim mio mir mit mmb mmi mmm mmo mmr mmt mob moi mom moo mor mot mrb mri mrm mro mrr mrt mtb mti mtm mto mtr mtt o-i ob- obb obi obm obo obr obt oib oii oim oio oir oit om- omb omi omm omo omr omt oo- oob ooi oom ooo oor oot or- orb ori orm oro orr ort ot- otb oti otm oto otr ott rbb rbi rbm rbo rbr rbt rib rii rim rio rir rit rmb rmi rmm rmo rmr rmt rob roi rom roo ror rot rrb rri rrm rrr rrt rtb rti rtm rto rtr rtt tbb tbi tbm tbo tbr tbt tib tii tim tio tir tit tmb tmi tmm tmo tmr tmt to- tob toi tom too tor tot trb tri trm tro trr trt ttb tti ttm tto ttr ttt