4/6	4/13	4/20	4/27
S1	B	S1	S2
S1	B	S1	S2
S1	P	S1	S2
S1	B	S1	S2

5/4	5/11	5/18	5/25
S1	S1	S3	P
S1	S1	S3	P
S1	S1	S3	B
S1	S1	S3	P