#include<bits/stdc++.h> using namespace std; signed main(){ int n; string a; cin>>a>>n; int alen=a.size(); for(int i=1;i<=n;i++){ for(int j=0;j<alen;j++){ if(a[j]>a[j+1]&&a[j+1]!=-1){ a.replace(j,1,""); break; } } } cout<<a; return 0; }