C1111233131211111211113313231333133313331323221211111333133313133311233121   >>    C111123313121111121111331323133313331333132322121111133313331313331123312   <<    C1111233131211111211113313231333133313331323221211111333133313133311233123   >>      C1111233131211111211113313231333133313331323221211111333133313133311233122   >>