#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;
	return 0 ;
}

/**************************************************************
	Problem: 1373
	User: chenkexin
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2076 kb
****************************************************************/