C1111233131211111211113313331333133313232321333133313331331122133312111   >>    C111123313121111121111331333133313331323232133313331333133112213331211   <<    C1111233131211111211113313331333133313232321333133313331331122133312113   >>      C1111233131211111211113313331333133313232321333133313331331122133312112   >>