C1111233133313231133133313331333132313231333121111331313232213121   >>    C111123313331323113313331333133313231323133312111133131323221312   <<    C1111233133313231133133313331333132313231333121111331313232213123   >>      C1111233133313231133133313331333132313231333121111331313232213122   >>