C1111233131211111211113313331333133313232321331133132313331333231121   >>    C111123313121111121111331333133313331323232133113313231333133323112   <<    C1111233131211111211113313331333133313232321331133132313331333231123   >>      C1111233131211111211113313331333133313232321331133132313331333231122   >>