C1111233131211111211113313331333133313232313331333133313113133313311221123231   >>    C111123313121111121111331333133313331323231333133313331311313331331122112323   <<    C1111233131211111211113313331333133313232313331333133313113133313311221123233   >>      C1111233131211111211113313331333133313232313331333133313113133313311221123232   >>