C1111233133313231133133313331333132313231333121111133313232231211   >>    C111123313331323113313331333133313231323133312111113331323223121   <<    C1111233133313231133133313331333132313231333121111133313232231213   >>      C1111233133313231133133313331333132313231333121111133313232231212   >>