#include <bits/stdc++.h> using namespace std; int n; vector<int> vec; signed main() { int c; while (!isdigit(c = getchar())); vec.push_back(c-'0'); while (isdigit(c = getchar())) vec.push_back(c-'0'); scanf("%d", &n); int cnt = 0; for (int i=1;cnt < n && i < vec.size(); i++) { while (vec[i] <= vec[i-1] && i>0) { vec.erase(vec.begin()+i-1); i--; cnt++; } } for (int i=0; i<vec.size(); i++) printf("%d", vec[i]); return 0; }