#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl "\n"
#define rep(i, a, n) for (int i = a; i < n; ++i)

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int h, n;
    cin >> h >> n;
    vector<int> hi(n - 1);
    rep(i, 0, n - 1) cin >> hi[i];

    sort(hi.begin(), hi.end());
    reverse(hi.begin(), hi.end());
    rep(i, 0, n - 1) {
        if (hi[i] < h) {
            int mod = (i + 1) % 10;
            if (mod == 1) {
                cout << i + 1 << "st" << endl;
            } else if (mod == 2) {
                cout << i + 1 << "nd" << endl;
            } else if (mod == 3) {
                cout << i + 1 << "rd" << endl;
            } else {
                cout << i + 1 << "th" << endl;
            }
            return 0;
        }
    }
    int mod = n % 10;
    if (mod == 1) {
        cout << n << "st" << endl;
    } else if (mod == 2) {
        cout << n << "nd" << endl;
    } else if (mod == 3) {
        cout << n << "rd" << endl;
    } else {
        cout << n << "th" << endl;
    }
    return 0;
}