b-u bbb bbd bbm bbr bbs bbu bdb bdd bdm bdr bds bdu bmb bmd bmm bmr bms bmu brb brd brm brr brs bru bsb bsd bsm bsr bss bsu bub bud bum bur bus buu dbb dbd dbm dbr dbs dbu ddb ddd ddm ddr dds ddu dmb dmd dmm dmr dms dmu drb drd drm drr drs dru dsb dsd dsm dsr dss dsu dub dud dum dur dus m-r mbb mbd mbm mbr mbs mbu mdb mdd mdm mdr mds mdu mmb mmd mmm mmr mms mmu mrb mrd mrm mrr mrs mru msb msd msm msr mss msu mub mud mum mur mus muu rbb rbd rbm rbr rbs rbu rdb rdd rdm rdr rds rdu rmb rmd rmm rmr rms rrb rrd rrm rrr rrs rru rsb rsd rsm rsr rss rsu rub rud rum rur rus ruu sbb sbd sbm sbr sbs sbu sdb sdd sdm sdr sds sdu smb smd smm smr sms smu sr- srb srd srm srr srs ss- ssb ssd ssm ssr sss ssu sub sud sum sur sus suu ubb ubr ubs ubu udb udd udm udr uds udu um- umb umd umm umr ums umu ur- urb urd urm urr urs uru usb usd usm usr uss usu uum uur uus uuu