A_num_for_input =  input()
k = int(input())
abss_k = abs(k)
l_ipt = len(A_num_for_input)
zero_status = True

if abss_k > l_ipt:
    print("Error")
elif abss_k == l_ipt:
    print(A_num_for_input)
elif k == 0:
    print(A_num_for_input)
elif k > 0:
    for i in range(abss_k):
        if A_num_for_input[i] == "0" and zero_status:
            continue
        else:
            zero_status = False
            print(A_num_for_input[i], end = '')
elif k < 0 :
    for i in range((l_ipt-abss_k) , l_ipt):
        if A_num_for_input[i] == "0" and zero_status:
            continue
        else:
            zero_status = False
            print(A_num_for_input[i], end = '')