trt	time	subject	y
A	T1	1	10
A	T1	2	12
A	T1	3	13
A	T2	1	16
A	T2	2	19
A	T2	3	20
A	T3	1	25
A	T3	2	27
A	T3	3	28
B	T1	4	12
B	T1	5	11
B	T1	6	10
B	T2	4	18
B	T2	5	20
B	T2	6	22
B	T3	4	25
B	T3	5	26
B	T3	6	27
C	T1	7	10
C	T1	8	12
C	T1	9	13
C	T2	7	22
C	T2	8	23
C	T2	9	22
C	T3	7	31
C	T3	8	34
C	T3	9	33