C1111233131211111211113313331333133313232321333133313121111332223213331   >>    C111123313121111121111331333133313331323232133313331312111133222321333   <<    C1111233131211111211113313331333133313232321333133313121111332223213333   >>      C1111233131211111211113313331333133313232321333133313121111332223213332   >>