C3123121111113313121111331333133313331333223313231333132332313232321   >>    C312312111111331312111133133313331333133322331323133313233231323232   <<    C3123121111113313121111331333133313331333223313231333132332313232323   >>      C3123121111113313121111331333133313331333223313231333132332313232322   >>