#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

inline string ord(int i) {
  if (i % 10 == 1 && i != 11) return to_string(i) + "st";
  if (i % 10 == 2 && i != 12) return to_string(i) + "nd";
  if (i % 10 == 3 && i != 13) return to_string(i) + "rd";
  return to_string(i) + "th";
}

int main() {
  int h, n;
  cin >> h >> n;
  vector<int> a(n);
  rep(i, n - 1) cin >> a[i];
  a.back() = h;
  sort(a.begin(), a.end());
  cout << ord(n - (lower_bound(a.begin(), a.end(), h) - a.begin())) << endl;
  return 0;
}