C11231323321111331312111133133313331323223313231333131133132322122321   >>    C1123132332111133131211113313331333132322331323133313113313232212232   <<    C11231323321111331312111133133313331323223313231333131133132322122323   >>      C11231323321111331312111133133313331323223313231333131133132322122322   >>