C1111133313331323223313331333133313331333131211113313331211111211111133233231   >>    C111113331333132322331333133313331333133313121111331333121111121111113323323   <<    C1111133313331323223313331333133313331333131211113313331211111211111133233233   >>      C1111133313331323223313331333133313331333131211113313331211111211111133233232   >>