C1111233131211111211113313331333133313231323331323133313223231211   >>    C111123313121111121111331333133313331323132333132313331322323121   <<    C1111233131211111211113313331333133313231323331323133313223231213   >>      C1111233131211111211113313331333133313231323331323133313223231212   >>