N, K = map(int, input().split())
N = str(N)
K -= 1
ans = []
for n in N[::-1]:
	n = int(n) + 1
	K, r = divmod(K, n)
	ans.append(str(r))
while len(ans) > 1 and ans[-1] == "0":
	ans.pop()
ans = ans[::-1]
print("".join(ans))