C11111333133313232233133313331333131133131211113311233132313331   >>    C1111133313331323223313331333133313113313121111331123313231333   <<    C11111333133313232233133313331333131133131211113311233132313333   >>      C11111333133313232233133313331333131133131211113311233132313332   >>