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

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>

int main() {
  int n, q;
  cin >> n >> q;
  string s;
  cin >> s;
  vector<int> v(n);
  rep(i, n) v[i] = s[i]-'a';
  rep(i, q) {
    int l, r, x;
    cin >> l >> r >> x;
    l--, r--, x--;
    vector<int> subv;
    for (int j = l; j <= r; j++) subv.push_back(v[j]);
    sort(subv.begin(), subv.end());
    string ans;
    ans.push_back(subv[x]+'a');
    cout << ans << endl;
  }

}