100
1
40 0
40
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
S  1
N  1
