C11111333133313232233133313331333133313231313131211113313231121133131133132211   >>    C1111133313331323223313331333133313331323131313121111331323112113313113313221   <<    C11111333133313232233133313331333133313231313131211113313231121133131133132213   >>      C11111333133313232233133313331333133313231313131211113313231121133131133132212   >>