A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
X
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N
A
M
N