C1111233131211111211113313331333133313231121133132313331333232223321321   >>    C111123313121111121111331333133313331323112113313231333133323222332132   <<    C1111233131211111211113313331333133313231121133132313331333232223321323   >>      C1111233131211111211113313331333133313231121133132313331333232223321322   >>