b-u bbb bbi bbm bbo bbr bbs bbu bi- bib bii bim bio bir bis biu biv bmb bmi bmm bmo bmr bms bmu bmv bob boi bom boo bor bos bou bov brb bri brm bro brr brs bru brv bsb bsi bsm bso bsr bss bsu bsv bub bui bum buo bur bus buu bvb bvi bvm bvo bvr bvs bvu bvv i-v ibb ibi ibm ibo ibr ibs ibu ibv iib iii iim iio iir iis iiu im- imb imi imm imo ims imu imv io- iob ioi iom ioo ior ios iou iov ir- irb iri irm iro irr irs iru irv is- isb isi ism iso isr iss isu isv iu- iub iui ium iur ius ivb ivi ivo ivr ivs ivu ivv m-o m-r m-v mbb mbi mbm mbo mbr mbs mbu mbv mi- mib mii mim mio mir mis miu miv mmb mmi mmm mmo mmr mms mmu mmv mob moi mom moo mor mos mou mov mrb mri mrm mro mrr mrs mru mrv msb msi msm mso msr mss msu msv mub mui mum mur mus muu mvb mvi mvm mvo mvr mvs mvv o-i ob- obb obi obm obo obr obs obu obv oib oii oim oio oir ois oiu oiv om- omb omi omm omo omr oms omu omv oo- oob ooi oom ooo oor oos oov or- orb ori orm oro orr ors oru orv os- osb osi osm oso osr oss osu osv ou- oui oum ouo our ous ov- ovb ovi ovo ovs ovv rbb rbi rbm rbo rbr rbs rbu rib rii rim rio rir ris riv rmb rmi rmm rmo rmr rms rmv rob roi rom roo ror ros rou rov rrb rri rrm rrr rrs rru rsb rsi rsm rso rsr rss rsu rsv rub rui rum ruo rur rus ruu ruv rvb rvi rvm rvo rvr rvs rvu rvv sbb sbi sbm sbo sbr sbs sbu sbv sib sii sim sio sir sis siu siv smb smi smm smo smr sms smu smv sob soi som soo sor sos sou sov sr- srb sri srm sro srr srs srv ss- ssb ssi ssm sso ssr sss ssu ssv sub sui sum suo sur sus suu suv svb svi svm svo svr svs svu svv ubb ubi ubo ubr ubs ubu ubv uib uii uim uio uir uis uiu um- umb umi umm umo umr ums umu uob uom uoo uor uos ur- urb uri urm uro urr urs uru usb usi usm uso usr uss usu usv uum uur uus uuu uvb uvm uvo uvs uvu uvv vbi vbm vbo vbr vbs vbv vi- vib vii vim vio vir vis viu viv vm- vmi vmm vmo vmr vmu vob voi vom voo vor vos vou vov vrb vri vrm vrr vrs vru vsb vsi vsm vso vsr vss vsu vsv vum vur vus vuv vvb vvi vvm vvo vvr vvs vvv