#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int h,n;cin >> h >> n;
	vector<int> a(n);
	rep(i,n-1) cin >> a.at(i);
	a.at(n-1)=h;
	sort(a.rbegin(),a.rend());
	int ans=0;
	rep(i,n){
		if(a.at(i)==h) ans=i;
	}
	ans++;
	if(ans%10==1){
		cout << ans << "st" << endl;
	}
	else if(ans%10==2){
		cout << ans << "nd" << endl;
	}
	else if(ans%10==3){
		cout << ans << "rd" << endl;
	}
	else cout << ans << "th" << endl;
}