b-u bbb bbm bbr bbs bbu bmb bmm bmr bms bmu brb brm brr brs bru bsb bsm bsr bss bsu bub bum bur bus buu m-r mbb mbm mbr mbs mbu mmb mmm mmr mms mmu mrb mrm mrr mrs mru msb msm msr mss msu mub mum mur mus muu rbb rbm rbr rbs rbu rmb rmm rmr rms rrb rrm rrr rrs rru rsb rsm rsr rss rsu rub rum rur rus ruu sbb sbm sbr sbs sbu smb smm smr sms smu sr- srb srm srr srs ss- ssb ssm ssr sss ssu sub sum sur sus suu ubb ubr ubs ubu um- umb umm umr ums umu ur- urb urm urr urs uru usb usm usr uss usu uum uur uus uuu

bbbb bbbs bmus brrm brrr brrs brsb brsr brum brus bsms bsrm bssm bubb bubs bubu bum- bumb bums bur- burb burm burr burs buru buss busu buus mbbs mbms mbrs mbus mmmm mmms mmsu mmus mrbb mrbm mrbs msmb msmm msms msmu msrb mssm mssr msus mubs mumm mums mumu murr murs muru muss musu rbbb rbbr rbbs rbms rbss rmbs rrrr rrum rsum rubb rubs rubu rumb rumm rums rurs ruru russ rusu sbbs sbus smss smur smus srub ssbr ssrm ssrs sssb sssm ssss sub- subb subm subs sum- sums sumu sur- surr surs suru sus- suss susu suum suus umb- umms umsu umus urbs urss ursu urum urur urus usbr usbs usmm usms ussb ussr usss ussu usus uuuu

bbuss brmmm brrrr brumm bruss bumbu burbs burrs burru burus bussu busum busur busuu mburu mmmmm mummu murru murum murus rubus rummu rus-m s-bus smbus smurr smuss sssrb sssss subbu subss sumru sumur surur surus susus ursus urubu urums uuuuu

bbbbbb brubru bububu burbur bussum murmur musmus mussum muumuu rubrum rumbur russus suburb summum sumuru sursum surumu susumu susurr ubussu umbuss

bbbbbbb burruss murmurs muu-muu muumuus sssssss suburbs sursum-

bbbbbbbb buruburu mbumburu murumuru musumusu sussurus susurrus

mmmmmmmmmmmm

bbbbbbbbbbbbbbb