C111123313121111121111331333133313331333132233133313121111331333132313232223221   >>    C11112331312111112111133133313331333133313223313331312111133133313231323222322   <<    C111123313121111121111331333133313331333132233133313121111331333132313232223223   >>      C111123313121111121111331333133313331333132233133313121111331333132313232223222   >>