//SUST_ZadeedBoss_Fanclub
//code_korlei_life_ase
//na_korle_lifeNai

#include<bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <typename T> using o_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define int long long
#define double long double
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); 

int dp[100005][10];
void solve ()
{
	int n; cin >>n; n++;
	string s; cin >>s; s= "$" + s;
	vector <char> v = {'a', 'e', 'i', 'o', 'u'};
	int ans = 1e9;
	while (1)
	{

		for (int i=1; i<n; i++)
		{
			dp[i][0] = dp[i-1][0] + (s[i]!=v[0]);
			for (int j=1; j<5; j++)
			{
				dp[i][j] = min(dp[i-1][j-1], dp[i-1][j]) + (s[i]!=v[j]);
				dp[i][j] = min(dp[i][j], dp[i][j-1]);
			}
		}
		for (int j=0; j<5; j++)
		{
			ans = min(ans, dp[n-1][j]);
		}

		next_permutation(all(v));
		if (is_sorted(all(v))) break;
	}
	cout <<ans <<"\n";

}

signed main()
{

	ios_base::sync_with_stdio(0);
	cin.tie(NULL);

	int TCASE = 1;
	cin >> TCASE;

	for (int tcase = 1; tcase <= TCASE; tcase++)
	{
		solve();
	}

}