#include <bits/stdc++.h>

using namespace std;
string s;
int l, r, t, dl;
int main(){
    cin >> t;
    for(int j =1; j <= t; j++){
        cin >> dl;
    cin >> s;
    l = 0;
    r = 0;
    for(int i = 0; i < s.size(); i++){
        if(s[i] == '<')l++;
        else break;
    }
    for(int i = s.size() - 1; i >= 0; i--){
        if(s[i] == '>')r++;
        else break;
    }
    cout << min(l, r) << endl;
    }
}