1.  rows = 3
2.  cols = 4
3.  height = 5
4.  x = [[[0 for k in range(height)] for j in range(cols)] for i in range(rows)]
5.  for i in range(rows):
6.     for j in range(cols):
7.         for k in range(height):
8.            x[i][j][k] = i + j + k          
9.  for  i in range(rows):
10.    for j in range(cols):
11.       print(x[i][j])
12.    print()
        
