C1111133313331323223313331333133313113313223313331333131233332211   >>    C111113331333132322331333133313331311331322331333133313123333221   <<    C1111133313331323223313331333133313113313223313331333131233332213   >>      C1111133313331323223313331333133313113313223313331333131233332212   >>