我在SAS上运行下列代码显示提交的代码包含长于6000个字符是怎么回事，求解释看看出现了什么问题
data test1;
input ad $ x@@;
cards;
N0  490.4  N0  487.5  N0  496.4
N1  500.2  N1  510.2  N1  505.4
N2  509.5  N2  510.3  N2  507.3
N3  523.1  N3  515.7  N3  518.9
;  
run;
proc anova data=test1;
class ad;
model x=ad;
means ad /t;
run;