C11112331312111112111133133313331333132322121111331123313231313111   >>    C1111233131211111211113313331333133313232212111133112331323131311   <<    C11112331312111112111133133313331333132322121111331123313231313113   >>      C11112331312111112111133133313331333132322121111331123313231313112   >>