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opg 13 g (A (E (N (B), B (N)), N (E (B), B (E)), B (N (E), E (N))), B (A…
opg 13 g
A
E
N
B
B
N
N
E
B
B
E
B
N
E
E
N
B
A
E
N
N
E
E
A
N
N
A
N
E
A
A
E
E
B
A
N
N
A
N
A
B
B
A
A
B
N
N
B
N
A
E
B
B
E
B
E
A
A
E
E
A
B
B
A