C11231323321111331312111133133313331323223313231333131331123121111   >>    C1123132332111133131211113313331333132322331323133313133112312111   <<    C11231323321111331312111133133313331323223313231333131331123121113   >>      C11231323321111331312111133133313331323223313231333131331123121112   >>