b-u bbb bbc bbh bbo bbs bbu bcb bcc bch bco bcs bcu bhb bhc bhh bho bhs bhu bob boc boh boo bos bou bsb bsc bsh bso bss bsu bub buc buh buo bus buu c-- cbb cbc cbh cbo cbs cbu ccb ccc cch cco ccs ccu ch- chb chc chh cho chs chu co- cob coc coh coo cos cou csb csc csh cso css csu cub cuc cuh cuo cus cuu hbb hbc hbh hbo hbs hbu hcb hcc hch hco hcs hhb hhc hhh hho hhs hhu hob hoc hoh hoo hos hou hsb hsc hsh hss hsu hub huc huh huo hus huu ob- obb obc obh obo obs obu oc- ocb occ och oco ocs ocu ohc ohh oho ohs ohu oo- oob ooc ooh ooo oos os- osb osc osh oso oss osu ou- ouc ouh ouo ous sbb sbc sbh sbo sbs sbu scb scc sch sco scs scu sh- shb shc shh sho shs shu sob soc soh soo sos sou ss- ssb ssc ssh sso sss ssu sub suc suh suo sus suu ubb ubc ubh ubo ubs ubu ucb ucc uch uco ucs ucu uhb uhc uhh uho uhs uhu uob uoc uoo uos usb usc ush uso uss usu uuc uus uuu