C11111333133313232233133313331333131133132313331322133313223332211   >>    C1111133313331323223313331333133313113313231333132213331322333221   <<    C11111333133313232233133313331333131133132313331322133313223332213   >>      C11111333133313232233133313331333131133132313331322133313223332212   >>