C312312111112111113121333133313331333133313331333211232313233313332233221211   >>    C31231211111211111312133313331333133313331333133321123231323331333223322121   <<    C312312111112111113121333133313331333133313331333211232313233313332233221213   >>      C312312111112111113121333133313331333133313331333211232313233313332233221212   >>