4/7	4/14	4/21	4/28
S1	S1	S2	B
S1	S1	S2	P
S1	S1	S2	B
S1	S1	S2	P

5/5	5/12	5/19	5/26
S1	S1	S3	P
S1	S1	S3	B
S1	S1	S3	P
S1	S1	S3	B