C1111233131211111211113313231333133313331323221333133313113231211   >>    C111123313121111121111331323133313331333132322133313331311323121   <<    C1111233131211111211113313231333133313331323221333133313113231213   >>      C1111233131211111211113313231333133313331323221333133313113231212   >>