n = int(input())

from collections import Counter
def check_ans(ans, d) -> bool:
	c = Counter(str(ans))
	for i, count in enumerate(d, 1):
		if c[str(i)] < count:
			return False
	return True

for _ in range(n):
	M = int(input())
	d = list(map(int, input().split()))
	
	ans = ""
	for i, count in enumerate(d, 1):
		ans += str(i) * count
	
	while len(ans) < 18:  # 18桁にする
		ans += "9"
	ans = int(ans)
	
	remainder = ans % M
	ans -= remainder
	
	if check_ans(ans, d) == False:
		assert False
	
	print(ans)