#include<bits/stdc++.h>
#define endl        '\n'
#define F           first
#define S           second
#define pb          push_back
#define yes         cout<<"YES\n"
#define no          cout<<"NO\n"
#define all(x)      x.begin(),x.end()
#define allr(x)     x.rbegin(),x.rend()
#define error1(x)   cerr<<#x<<" = "<<(x)<<endl
#define error2(a,b) cerr<<"("<<#a<<", "<<#b<<") = ("<<(a)<<", "<<(b)<<")\n";
#define coutall(v)  for(auto &it: v) cout << it << " "; cout << endl;
using namespace std;
using ll = long long;
using ld = long double;

const int inf = 1e9;

void solve() {
    ll n;
    string s1, s2;
    cin >> n >> s1;
    s2 = "aeiouaeiou";
    map<char, int> mp = {{'a', 0}, {'e', 1}, {'i', 2}, {'o', 3}, {'u', 4}};
    vector<vector<int>> pos(5);
    for(int i = 0; i < s2.size(); i++) {
        pos[mp[s2[i]]].pb(i);
    }
    vector<vector<int>> pre(5, vector<int> (n + 1, 0));
    s1 = '#' + s1; // 1'base
    for(int ch = 0; ch < 5; ch++) {
        for(int i = 1; i <= n; i++) {
            auto it = lower_bound(all(pos[ch]), pos[mp[s1[i]]][0]);
            pre[ch][i] = pre[ch][i - 1] + (*it - pos[mp[s1[i]]][0]);
        }
        //cout << ch << " => "; coutall(pre[ch]);
    }

    vector<vector<int>> dp(33, vector<int> (n + 1, -1));
    
    auto rec = [&](auto&& self, int i, bitset<5> &vis) -> int {
        if(i > n) return 0;
        int &ans = dp[vis.to_ullong()][i];
        if(ans != -1) return ans;
        ans = inf;
        for(int ch = 0; ch < 5; ch++) {
            if(vis[ch]) continue;
            vis[ch] = 1;
            for(int j = i; j <= n; j++) {
                ans = min(ans, pre[ch][j] - pre[ch][i - 1] + self(self, j + 1, vis));
            }
            vis[ch] = 0;
        }
        return ans;
    };

    bitset<5> vis = 0;
    cout << rec(rec, 1, vis) << endl;
    return;

    return;
}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int tc = 1;
    cin >> tc;
    for (int t = 1; t <= tc; t++) {
        // cout << "Case " << t << ": ";
        solve();
    }
    return 0;
}