ggg ggo ggr ggs ggu gko gks gog gok goo gor gos gou grg grk gro grr grs gru gsg gsk gso gsr gss gsu gu- gug guk guo gur gus guu kgo kgs kgu kkk kkr kks kku kog kok koo kor kos kou krg krk kro krr krs kru ksg ksk kso ksr kss ksu kug kuk kur kus kuu ogg ogo ogs okg okk oko okr oks oku oo- oog ook ooo oor oos or- org ork oro orr ors oru os- osg osk oso osr oss osu ou- ouk ouo our ous rgg rgk rgo rgr rgs rkg rkk rko rks rku rog rok roo ror ros rou rrg rrk rrr rrs rru rsg rsk rso rsr rss rsu rug ruk ruo rur rus ruu sgg sgk sgo sgr sgs sgu sk- skg skk sko skr sks sku sog sok soo sor sos sou sr- srg srk sro srr srs ss- ssg ssk sso ssr sss ssu sug suk suo sur sus suu ugg ugk ugo ugr ugs ugu ukk ukr uku uog uok uoo uor uos ur- urg urk uro urr urs uru usg usk uso usr uss usu uug uur uus uuu