C1111233131211111211113313331333133313232321331133132313331333133313231313331   >>    C111123313121111121111331333133313331323232133113313231333133313331323131333   <<    C1111233131211111211113313331333133313232321331133132313331333133313231313333   >>      C1111233131211111211113313331333133313232321331133132313331333133313231313332   >>