C31232233133313221211113313331333133313331212111133133313211232321311   >>    C3123223313331322121111331333133313331333121211113313331321123232131   <<    C31232233133313221211113313331333133313331212111133133313211232321313   >>      C31232233133313221211113313331333133313331212111133133313211232321312   >>