C1111233131211111211113313331333133313232321331133132313331333233112111   >>    C111123313121111121111331333133313331323232133113313231333133323311211   <<    C1111233131211111211113313331333133313232321331133132313331333233112113   >>      C1111233131211111211113313331333133313232321331133132313331333233112112   >>