C1111233131211111211113313331333133313232321333133313121111331122112312131   >>    C111123313121111121111331333133313331323232133313331312111133112211231213   <<    C1111233131211111211113313331333133313232321333133313121111331122112312133   >>      C1111233131211111211113313331333133313232321333133313121111331122112312132   >>