b-u bbb bbd bbg bbo bbr bbt bbu bdb bdd bdg bdo bdr bdt bdu bgb bgd bgg bgo bgr bgt bgu bob bod bog boo bor bot bou brb brd brg bro brr brt bru btb btd btg bto btr btt btu bub bud bug buo bur but buu dbb dbd dbg dbo dbr dbt dbu ddb ddd ddg ddo ddr ddt ddu dgd dgg dgr dgt dgu dob dod dog doo dor dot dou drb drd drg dro drr drt dru dtb dtd dtg dto dtr dtt dtu dub dud dug duo dur dut g-d gbd gbg gbo gbr gbt gbu gdb gdd gdo gdr gdt gdu ggb ggd ggg ggo ggr ggt ggu gob god gog goo gor got gou grb grd grg gro grr grt gru gtb gtd gtg gto gtr gtt gtu gu- gub gud gug guo gur gut guu ob- obb obd obg obo obr obt obu odb odd odg odo odr odt odu ogd ogg ogo ogt oo- oob ood oog ooo oor oot or- orb ord org oro orr ort oru ot- otb otd otg oto otr ott otu ou- oud ouo our out rbb rbd rbg rbo rbr rbt rbu rdb rdd rdg rdo rdr rdt rdu rgb rgd rgg rgo rgr rgt rob rod rog roo ror rot rou rrb rrd rrg rrr rrt rru rtb rtd rtg rto rtr rtt rtu rub rud rug ruo rur rut ruu tbb tbd tbg tbo tbr tbt tbu tdb tdd tdg tdo tdr tdt tdu tgb tgg tgo tgr tgt tgu to- tob tod tog too tor tot tou trb trd trg tro trr trt tru ttb ttd ttg tto ttr ttt ttu tub tud tug tuo tur tut tuu ubb ubg ubo ubr ubt ubu udb udd udg udo udr udt udu ugb ugg ugo ugr ugt ugu uob uod uog uoo uor uot ur- urb urd urg uro urr urt uru utb utd uto utr utt utu uug uur uut uuu