S1A

0

S1B

0

S1C

0

S1D

0

S2A

0

S2B

0

S2C

0

S3A

0

S3B

0

S3C

0

S4A

0

S4C

0

S5A

0

S5B

0

S5C

0

S6A

0

S6C

0