4/3	4/10	4/17	4/24
S1	S1	S2	B
S1	S1	P	S2
S1	S1	S2	B
S1	S1	S2	P
S1	S1	S2	B

5/1	5/8	5/15	5/22
S1	S1	S3	P
S1	S1	S3	B
S1	S1	S3	P
S1	S1	S3	B
S1	S1	S3	P