# b_nth_diamond.py

# b_nth_diamond.py

def nth_diamond(nth):
    s = []
    for j in range(nth+1):
        t = '   '+'  '*(nth-j)+'*   '*j
        s += [t]
    s = s[:-1]+s[::-1]
    return '\n'.join(s)
print nth_diamond(5)