#include<bits/stdc++.h>
using namespace std;
int n,k,a[260],rest,t=1,minn,cnt=0;
bool flag=0;
string s;
int main(){
cin>>s>>k;
for(int i=1;i<=k;i++){
int j=0;
while(j+1<s.size()&&s[j]<=s[j+1]) j++;
s.erase(j,1);
}
while(s.size()>1&&s[0]=='0') s.erase(0,1);
cout<<s;
return 0;
}