#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    string s;
    cin >> n >> s;
    int ans = 100;
    for (int i = 0; i < n; i++) {
      if (s[i] == '>') {
        ans = min(ans, i);
        break;
      }
    }
    for (int i = n - 1; i >= 0; i--) {
      if (s[i] == '<') {
        ans = min(ans, n - i - 1);
        break;
      }
    }
    cout << ans << endl;
  }
  return 0;
}
