b-u bbb bbi bbm bbo bbr bbt bbu bi- bib bii bim bio bir bit biu bmb bmi bmm bmo bmr bmt bmu bob boi bom boo bor bot bou brb bri brm bro brr brt bru btb bti btm bto btr btt btu bub bui bum buo bur but buu ibb ibi ibm ibo ibr ibt ibu iib iii iim iio iir iit iiu im- imb imi imm imo imt imu io- iob ioi iom ioo ior iot iou ir- irb iri irm iro irr irt iru itb iti itm ito itt itu iu- iub iui ium iur iut m-o m-r mbb mbi mbm mbo mbr mbt mbu mi- mib mii mim mio mir mit miu mmb mmi mmm mmo mmr mmt mmu mob moi mom moo mor mot mou mrb mri mrm mro mrr mrt mru mtb mti mtm mto mtr mtt mtu mub mui mum mur mut muu o-i ob- obb obi obm obo obr obt obu oib oii oim oio oir oit oiu om- omb omi omm omo omr omt omu oo- oob ooi oom ooo oor oot or- orb ori orm oro orr ort oru ot- otb oti otm oto otr ott otu ou- oui oum ouo our out rbb rbi rbm rbo rbr rbt rbu rib rii rim rio rir rit rmb rmi rmm rmo rmr rmt rob roi rom roo ror rot rou rrb rri rrm rrr rrt rru rtb rti rtm rto rtr rtt rtu rub rui rum ruo rur rut ruu tbb tbi tbm tbo tbr tbt tbu tib tii tim tio tir tit tiu tmb tmi tmm tmo tmr tmt tmu to- tob toi tom too tor tot tou trb tri trm tro trr trt tru ttb tti ttm tto ttr ttt ttu tub tui tum tuo tur tut tuu ubb ubi ubo ubr ubt ubu uib uii uim uio uir uit uiu um- umb umi umm umo umr umt umu uob uom uoo uor uot ur- urb uri urm uro urr urt uru utb uti utm uto utr utt utu uum uur uut uuu