#include <iostream>
#include <cmath>
#include <algorithm>
#include <string>
#include <queue>
using namespace std;
class this_is_main
{
public:
	this_is_main()
	{
		string a;
		int b;
		cin >> a >> b;
		for (int j = 0,k; j < b; j++)
		{
			k = 0;
			for (int i = 1; i <= a.size() - 1; i++)
			{
				if (a[i - 1] > a[i])
				{
					a = a.substr(0, i - 1) + a.substr(i, a.size() - i);
					k = 1;
					break;
				}
			}
			if (k == 0)
			{
				a = a.substr(0, a.size() - 1);
			}
		}
		if (a[0] == '0' && a.size() != 1)
		{
			a = a.substr(1, a.size() - 1);
		}
		cout << a;
	}
};
this_is_main run_main;
int main()
{
	return 0;
}