C1111233131211111211113313331333133313232321331133132313331333113121211   >>    C111123313121111121111331333133313331323232133113313231333133311312121   <<    C1111233131211111211113313331333133313232321331133132313331333113121213   >>      C1111233131211111211113313331333133313232321331133132313331333113121212   >>