import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.StringTokenizer;
import java.util.StringJoiner;
import java.util.stream.IntStream;
//import java.util.Arrays;

public class A {
 
	public static FastScanner fs = new FastScanner();
 
	public static void main(String[] args) {
		int t = fs.nextInt();
		for (int tc = 0; tc < t; tc++){
			solve();
		}
	}
	
	public static void solve(){
		int n = fs.nextInt(), res = 0, var = 0;
		String S = fs.next();
		if (n == 1){
			System.out.println(0);
			return ;
		}
		for (int i = n-1; i >=0 ; i--){
			char x = S.charAt(i);
			if (x == '<'){
				break;
			}else{
				var ++;
			}
		}
		res = Math.max(res , var);
		var = 0;
		for (int i = 0; i< n; i++){
			char x = S.charAt(i);
			if (x == '>'){
				break;
			}else{
				var ++;
			}
		}
		res = Math.max(res, var);
		System.out.println(res);
	}
		
	static void array_space(int[] A){
		StringJoiner sj = new StringJoiner(" ");
		IntStream.of(A).forEach(x -> sj.add(String.valueOf(x)));
		System.out.println(sj.toString());
	}
	
	static void sort(int[] a) {
		ArrayList<Integer> l=new ArrayList<>();
		for (int i:a) l.add(i);
		Collections.sort(l);
		for (int i=0; i<a.length; i++) a[i]=l.get(i);
	}
	
	static class FastScanner {
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st=new StringTokenizer("");
		String next() {
			while (!st.hasMoreTokens())
				try {
					st=new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}
		
		int nextInt() {
			return Integer.parseInt(next());
		}
		int[] readArray(int n) {
			int[] a=new int[n];
			for (int i=0; i<n; i++) a[i]=nextInt();
			return a;
		}
		long nextLong() {
			return Long.parseLong(next());
		}
	}
}