while 1:
	a=input()
	print" "*a+"__"*a;r=range(a)
	for i in r:print" "*(a-i-1)+"/"+"_ "[i<a-1]*(a*2-1)+"/"+" "*i*2+"\\"
	for i in r:print" "*i+"\\"+"_ "[i<a-1]*(a*2-1)+"\\"+" "*(a-i-1)*2+"/"