#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e4 + 7;
const int inf = 0x3f3f3f3f;
int a[maxn];
char s[150];
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    scanf("%s", s);
    int x = 0, y = 0;
    for (int i = 0; i < n; i++) {
      if (s[i] == '<')
        x++;
      else
        break;
    }
    for (int i = n - 1; i >= 0; i--) {
      if (s[i] == '>')
        y++;
      else
        break;
    }
    cout << min(x, y) << endl;
  }
  return 0;
}
