N,K = map(int,input().split())
N = str(N)
L = len(N)
ans = [0]*L
k = K
for i in range(L):
    cnt = 1
    for j in range(i+1,L):
        cnt *= (int(N[j])+1)
    flag = False
    for s in range(int(N[i]),0,-1):
        if s*cnt<k<=(s+1)*cnt:
            ans[i] = str(s)
            k -= s*cnt
            flag = True
            break
    if not flag:
        ans[i] = "0"
print(int("".join(ans)))