C1111233133313231133133313331333132313231333121111121111113313232321311   >>    C111123313331323113313331333133313231323133312111112111111331323232131   <<    C1111233133313231133133313331333132313231333121111121111113313232321313   >>      C1111233133313231133133313331333132313231333121111121111113313232321312   >>