#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
#define DUMP(x) cout << #x << " = " << (x) << endl;
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define IFOR(i, m, n) for (ll i = n - 1; i >= m; i--)
#define REP(i, n) FOR(i, 0, n)
#define IREP(i, n) IFOR(i, 0, n)
#define FOREACH(x, a) for (auto&(x) : (a))
#define ALL(v) (v).begin(), (v).end()
#define SZ(x) ll(x.size())

int main() {
  ll n, k;
  cin >> n >> k;
  string s;
  cin >> s;

  FOR(i, k, n + 1) { cout << s[i - 1]; }
  if ((n + k) % 2 == 1) {
    FOR(i, 1, k) { cout << s[i - 1]; }
  } else {
    IFOR(i, 1, k) { cout << s[i - 1]; }
  }
  cout << endl;
}