#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
using namespace std;
typedef long long lo;
typedef pair< lo,lo > PII;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
const lo MAX = -1000000000000000000;
const lo MIN = 1000000000000000000;
const lo inf = 1000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 200005;
const lo mod = 1000000007;
int n,m,k,flag,t,d[li];
int cev;
string s;
int main(void){
fio();
//~ freopen("simple.txt","r",stdin);
cin>>n>>k>>s;
//~ for(int jjj=1;jjj<=min(6,(int)sqrt(n)+5);jjj++){
int say=1;
d[0]=1;
for(int i=1;i<(int)s.size();i++){
if(s[i]==s[i-1])say++;
else say=1;
if(s[i]==s[i-1])d[i]=d[i-1]+1;
else d[i]=1;
//~ cout<<d[i]<<endl;
if(d[i]==k){
say=k;
while(say>0){
s.erase(s.begin()+i-k+1);
d[i-k+1+say-1]=1;
say--;
}
i-=k;
}
//~ cout<<s[i]<<" : ; "<<i<<endl;
}
//~ }
cout<<s<<endl;
return 0;
}
