#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;
            string ns = to_string(i + 1);
            ns = ns.substr(ns.size() - 1, 1);
            if (ns == "1") suffix = "st";
            else if (ns == "2") suffix = "nd";
            else if (ns == "3") suffix = "rd";
            else suffix = "th";
            cout << i + 1 << suffix << endl;
            return 0;
        }
    }
    string nns = to_string(N);
    nns = nns.substr(nns.size() - 1, 1);
    if (nns == "2") cout << N << "nd" << endl;
    else if (nns == "3") cout << N << "rd" << endl;
    else cout << N << "th" << endl;
    return 0;
}