#include <bits/stdc++.h>
using namespace std;
 
// Function to delete character at position i in the string
string delpos(int i, string s) {
    s.erase(i, 1);
    return s;
}
 
int main() {
    string s;
    int k, count = 0;
    cin >> s >> k;
 
    // Traverse the string from the beginning to the end
    for (int i = 0; i < s.size() - 1; i++) {
        if (s[i] < s[i + 1] && count < k) {
            s = delpos(i, s);
            count++;
            i--; // Adjust index after deletion
        }
    }
 
    // Traverse the string from the end to the beginning
    for (int i = s.size() - 1; i >= 0 && count < k; i--) {
        s = delpos(i, s);
        count++;
    }
 
    cout << s << endl;
    return 0;
}

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