C1111233131211111211113313331333133313232321333133313331311233131113223231   >>    C111123313121111121111331333133313331323232133313331333131123313111322323   <<    C1111233131211111211113313331333133313232321333133313331311233131113223233   >>      C1111233131211111211113313331333133313232321333133313331311233131113223232   >>