def print_sand_clock(N):
    
  if N<=0:
     print("Invalid input")
     return 

  for i in range(N,0,-1):
        row_str = str(i)*(2*i-1)
        print(row_str.center(2*N-1))
  for i in range(2,N+1):
        row_str = str(i)*(2*i-1)
        print(row_str.center(2*N-1))
N=5
print_sand_clock(N)