C1111233131211111211113313331333133313231323331322133313232213121   >>    C111123313121111121111331333133313331323132333132213331323221312   <<    C1111233131211111211113313331333133313231323331322133313232213123   >>      C1111233131211111211113313331333133313231323331322133313232213122   >>