C11112331312111112111133133313231333132313331333121111132233313231   >>    C1111233131211111211113313331323133313231333133312111113223331323   <<    C11112331312111112111133133313231333132313331333121111132233313233   >>      C11112331312111112111133133313231333132313331333121111132233313232   >>