C1111233131211111211113313331333133313331333133311221123222313111   >>    C111123313121111121111331333133313331333133313331122112322231311   <<    C1111233131211111211113313331333133313331333133311221123222313113   >>      C1111233131211111211113313331333133313331333133311221123222313112   >>