for _ in range(int(input())):
	a = 0
	n, k = map(int, input().split())
	l = len(str(k))
	for i in range(18 - l):
		a += max(10 ** (l + i), min(k * 10 ** (i + 1), n + 1)) - 10 ** (l + i)
	for i in range(l):
		a += max(10 ** (l - i - 1), min(k // (10 ** i), n)) - 10 ** (l - i - 1) + 1
	print(a)