N,K=input().split()
N=list(map(int,list(N)))
K=int(K)
cnt_in_k=[0 for _ in range(len(N))]
cnt_in_k[-1]=N[-1]+1
for i in range(len(N)-2,-1,-1):
    cnt_in_k[i]=(N[i]+1)*cnt_in_k[i+1]
ans=[0 for _ in range(len(N))]
while K:
    k=-1
    while cnt_in_k[k]<K:
        k-=1
    if k<-1:
        ans[k]=(K//cnt_in_k[k+1])-1
        K%=cnt_in_k[k+1]
    else:
        ans[k]=K-1
        K=0
print(int("".join(map(str,ans))))