def oi(): return int(input())
def os(): return input().rstrip()
def mi(): return list(map(int, input().split()))

# import sys
# input = sys.stdin.readline
# import sys
# sys.setrecursionlimit(10**8)
# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')
input_count = 0

N,K = mi()

K-=1
out = []
for n in str(N)[::-1]:
    m = int(n) + 1
    a,b = divmod(K, m)
    K = a
    out.append(str(b))
    # print(n)
print(int("".join(out[::-1])))