>>> x,y,f=5,5,'Free';xx,yy,p=x/2-1 if not x%2 else x//2,y/2-1 if not y%2 else y//2,max(len(str(x*y)),len(f));nums=list(range(1,75));__import__('secrets').SystemRandom().shuffle(nums);print('\n'.join([' '.join([f if r==xx and i==yy else f'{nums[r*y+i]:>{p}}' for i in range(x)])for r in range(y)]))
  73   67   44   68   51
  69   37   31   22   26
  55   12 Free   10   30
  28   25   38   50   19
  45   57   48   21   18