#include<bits/stdc++.h>
using namespace std;

int read()
{
	int s=0;
	char c=getchar(),lc='+';
	while (c<'0'||'9'<c) lc=c,c=getchar();
	while ('0'<=c&&c<='9') s=s*10+c-'0',c=getchar();
	return lc=='-'?-s:s;
}
void write(int x)
{
	if (x<0)
	{
		putchar('-');
		x=-x;
	}
	if (x<10) putchar(x+'0');
	else
	{
		write(x/10);
		putchar(x%10+'0');
	}
}
void print(int x,char c='\n')
{
	write(x);
	putchar(c);
}

signed main()
{
	int n=read(),k=read();
	print(n-k+1);

	return 0;
}
#include<iostream>
#include<string>
using namespace std;
int main(){
  int k;
  cin>>k;
  string s,S;
  cin>>s;
  if(s.length()<=k)
    cout<<s;
  else{
    for(int i=0;i<k;i++){
    	cout<<s[i];
	}
  cout<<"...";
}
}
  