#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    int H, N;
    cin >> H >> N;
    vector<int> hc;
    for (int i = 0; i < N - 1; i++) {
        int h;
        cin >> h;
        hc.push_back(h);
    }
    sort(hc.begin(), hc.end());
    reverse(hc.begin(), hc.end());
    for (int i = 0; i < N - 1; i++) {
        if (hc.at(i) < H) {
            string suffix;
            if (i == 0) suffix = "st";
            else if (i == 1) suffix = "nd";
            else if (i == 2) suffix = "rd";
            else suffix = "th";
            cout << i + 1 << suffix << endl;
            return 0;
        }
    }
    if (N == 2) cout << "2nd" << endl;
    else if (N == 3) cout << "3rd" << endl;
    else cout << N << "th" << endl;
    return 0;
}