b-u bbb bbk bbm bbo bbr bbs bbt bbu bkb bkk bkm bko bkr bks bkt bmb bmk bmm bmo bmr bms bmt bmu bob bok bom boo bor bos bot bou brb brk brm bro brr brs brt bru bsb bsk bsm bso bsr bss bst bsu btb btk btm bto btr bts btt btu bub buk bum buo bur bus but buu k-t kbb kbk kbm kbo kbr kbs kbu kkb kkk kkm kkr kks kkt kku kmb kmk kmm kmo kms kmt kmu kob kok kom koo kor kos kot kou krk kro krr krs krt kru ksb ksk ksm kso ksr kss kst ksu ktb ktk ktm kto ktr kts ktt ktu kub kuk kum kur kus kut kuu m-o m-r mbb mbk mbm mbo mbr mbs mbt mbu mkb mkk mkm mko mkr mks mkt mku mmb mmk mmm mmo mmr mms mmt mmu mob mok mom moo mor mos mot mou mrb mrk mrm mro mrr mrs mrt mru msb msk msm mso msr mss mst msu mtb mtk mtm mto mtr mts mtt mtu mub muk mum mur mus mut muu ob- obb obk obm obo obr obs obt obu okb okk oko okr oks oku om- omb omm omo omr oms omt omu oo- oob ook oom ooo oor oos oot or- orb ork orm oro orr ors ort oru os- osb osk osm oso osr oss ost osu ot- otb otk otm oto otr ots ott otu ou- ouk oum ouo our ous out rbb rbk rbm rbo rbr rbs rbt rbu rkb rkk rkm rko rks rkt rku rmb rmm rmo rmr rms rmt rob rok rom roo ror ros rot rou rrb rrk rrm rrr rrs rrt rru rsb rsk rsm rso rsr rss rst rsu rtb rtk rtm rto rtr rts rtt rtu rub ruk rum ruo rur rus rut ruu sbb sbk sbm sbo sbr sbs sbt sbu sk- skb skk skm sko skr sks skt sku smb smk smm smo smr sms smt smu sob sok som soo sor sos sot sou sr- srb srk srm sro srr srs srt ss- ssb ssk ssm sso ssr sss sst ssu stb stk stm sto str sts stt stu sub suk sum suo sur sus sut suu tbb tbk tbm tbo tbr tbs tbt tbu tkb tkk tkm tko tkr tks tkt tmb tmk tmm tmo tmr tms tmt tmu to- tob tok tom too tor tos tot tou trb trk trm tro trr trs trt tru tsb tsk tsm tso tsr tss tst tsu ttb ttk ttm tto ttr tts ttt ttu tub tuk tum tuo tur tus tut tuu ubb ubk ubo ubr ubs ubt ubu ukb ukk ukr uku um- umb umm umo umr ums umt umu uob uok uom uoo uor uos uot ur- urb urk urm uro urr urs urt uru usb usk usm uso usr uss ust usu utb utk utm uto utr uts utt utu uum uur uus uut uuu

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