b-u bbb bbc bbh bbk bbo bbs bbu bcb bcc bch bck bco bcs bcu bhb bhc bhh bhk bho bhs bhu bkb bkc bkk bko bks bob boc boh bok boo bos bou bsb bsc bsh bsk bso bss bsu bub buc buh buk buo bus buu c-- cbb cbc cbh cbk cbo cbs cbu ccb ccc cch cck cco ccs ccu ch- chb chc chh chk cho chs chu ckb ckc ckh cko cks co- cob coc coh cok coo cos cou csb csc csh csk cso css csu cub cuc cuh cuk cuo cus cuu hbb hbc hbh hbk hbo hbs hbu hcb hcc hch hck hco hcs hhb hhc hhh hhk hho hhs hhu hkb hkh hkk hko hks hku hob hoc hoh hok hoo hos hou hsb hsc hsh hsk hss hsu hub huc huh huk huo hus huu kbb kbc kbh kbk kbo kbs kbu kcb kcc kch kck kcs kcu khh khk kho khs khu kkb kkc kkh kkk kks kku kob koc koh kok koo kos kou ksb ksc ksh ksk kso kss ksu kub kuc kuh kuk kus kuu ob- obb obc obh obk obo obs obu oc- ocb occ och ock oco ocs ocu ohc ohh oho ohs ohu okb okc okk oko oks oku oo- oob ooc ooh ook ooo oos os- osb osc osh osk oso oss osu ou- ouc ouh ouk ouo ous sbb sbc sbh sbk sbo sbs sbu scb scc sch sck sco scs scu sh- shb shc shh shk sho shs shu sk- skb skc skh skk sko sks sku sob soc soh sok soo sos sou ss- ssb ssc ssh ssk sso sss ssu sub suc suh suk suo sus suu ubb ubc ubh ubk ubo ubs ubu ucb ucc uch uck uco ucs ucu uhb uhc uhh uho uhs uhu ukb ukc ukk uku uob uoc uok uoo uos usb usc ush usk uso uss usu uuc uus uuu

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