num=input()
n=[0]*len(num)
for i in range(len(num)):
    n[i]=int(num[i])

s=int(input())
for t in range(s):
    max_num=n[0];max_pos=0
    for i in range(1,len(n)-t):#找数
        if n[i]>max_num:
            max_num=n[i]
            max_pos=i
    for i in range(max_pos,len(n)-1-t):#删数
        n[i]=n[i+1]
for i in range(0,len(n)-s):
    print(n[i],end='')