C1111233133313231133133313331333132313231333121111133313113311311   >>    C111123313331323113313331333133313231323133312111113331311331131   <<    C1111233133313231133133313331333132313231333121111133313113311313   >>      C1111233133313231133133313331333132313231333121111133313113311312   >>