#include <bits/stdc++.h>

#define ll long long int

#define endl '\n'
using namespace std;
#define pb push_back

#define all(x) x.begin(), x.end()
ll k, kt ;string s ;
int main() {

ios_base::sync_with_stdio(false);

cin.tie(NULL);
cin >> s >> k ;
while (k > 0) {       

kt = 0 ;

for ( ll i=0 ; i < s.size()-1 ; i++)

if ( s[i] < s[i+1]) {

s.erase(i,1) ;

kt=1 ;

k-- ;

break ;

}

if ( kt == 0) {

while ( k--) s.erase(s.size()-1,1) ;

}

}
cout << s ;
}