C1111233133313231133133313331333132313231333121111121111113313232321333121   >>    C111123313331323113313331333133313231323133312111112111111331323232133312   <<    C1111233133313231133133313331333132313231333121111121111113313232321333123   >>      C1111233133313231133133313331333132313231333121111121111113313232321333122   >>