c-- ccc cch cco ccr ccs ccu ch- chc chh cho chr chs chu co- coc coh coo cor cos cou crc crh cro crr crs cru csc csh cso csr css csu cuc cuh cuo cur cus cuu hcc hch hco hcr hcs hhc hhh hho hhr hhs hhu hoc hoh hoo hor hos hou hr- hrc hrh hro hrr hrs hru hsc hsh hsr hss hsu huc huh huo hur hus huu oc- occ och oco ocr ocs ocu ohc ohh oho ohr ohs ohu oo- ooc ooh ooo oor oos or- orc orh oro orr ors oru os- osc osh oso osr oss osu ou- ouc ouh ouo our ous rcc rch rco rcr rcs rcu rh- rhc rhh rho rhr rhs rhu roc roh roo ror ros rou rrc rrh rrr rrs rru rsc rsh rso rsr rss rsu ruc ruh ruo rur rus ruu scc sch sco scr scs scu sh- shc shh sho shr shs shu soc soh soo sor sos sou sr- src srh sro srr srs ss- ssc ssh sso ssr sss ssu suc suh suo sur sus suu ucc uch uco ucr ucs ucu uhc uhh uho uhr uhs uhu uoc uoo uor uos ur- urc uro urr urs uru usc ush uso usr uss usu uuc uur uus uuu