C1111233133313231133133313331333132313231333121111133313231232311   >>    C111123313331323113313331333133313231323133312111113331323123231   <<    C1111233133313231133133313331333132313231333121111133313231232313   >>      C1111233133313231133133313331333132313231333121111133313231232312   >>