Codeforces_266B

//Codeforces Round 266B
#include <string>
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
    int n, t;
    string s;
    char mass[51];
    cin >> n >> t;
    cin >> s;
    strcpy(mass, s.c_str());
    for(int i=0;i<t;i++)
    {
        for(int y=0;y<n-1;y++)
        {
            if(mass[y]=='B' && mass[y+1]=='G')
            {
                mass[y]='G';
                mass[y+1]='B';
                y++;
            }
        }
    }
    cout << mass;
    return 0;
}