#include<bits/stdc++.h>
using namespace std;
int main()
{
    string n;
    int s;
    cin>>n>>s;
    int m;
    for(int i = 1;i<=s;i++)
    {
        m = n.size()-1;
        for(int j = 0;j<n.size()-1;j++)
        {
            if(n[j] > n[j+1])
            {
                m = j;
                break;
            }
        }
        n.erase(m,1);
    }
    while(n[0] == '0')
    {
        n.erase(0,1);
    }
    cout<<n;
}
/**************************************************************
	Problem: 1373
	User: wuyichen
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2076 kb
****************************************************************/