options ls=80 ps=66 nodate nonumber;
data estimable1;
input y A$ ;
datalines;
1 a1
2 a1
1 a1
2 a2
3 a2
2 a3
;
proc glm data = estimable1;
class A;
model y = A/ est solution;
run;
proc glm data = estimable1;
class A;
model y = A/ noint est solution;
run;