5 5
5
0 0 a 0 0
0 b 0 0 0
c 0 0 0 0
0 d 0 0 0
0 0 e 0 0

2 2
4
g e
f d

4 4
5
z 0 0 0
c 0 0 0
a 0 0 0
g 0 0 0

3 3
6
x c a
b 0 y
0 g 0

5 5
10
f g h i j
k l m n o
a b c d e
p q r s t
u v w x y