while True:
	if int(raw_input())==0:
		break
	else:
		s=map(int,raw_input().strip().split())
		s.sort()
		sn=[]
		for i in range(len(s)-1,0,-1):
			a=str(s[i])			
			for j in range(0,i):
				b=str(s[j])
				if len(a)==len(b):
					c=list(a)
					d=list(b)
					c.sort()
					d.sort()
					if c==d:
						sn.append(i)
						sn.append(j)
		sn=list(set(sn))
		for i in range(len(sn)-1,-1,-1):
			del s[sn[i]]
		if len(s)==0:		
			print "None"
		else:
			for i in s:
				print i,
			print