/*
    author:  Maksim1744
    created: 23.03.2024 11:16:35
*/

#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;

#define mp   make_pair
#define pb   push_back
#define eb   emplace_back

#define sum(a)     ( accumulate ((a).begin(), (a).end(), 0ll))
#define mine(a)    (*min_element((a).begin(), (a).end()))
#define maxe(a)    (*max_element((a).begin(), (a).end()))
#define mini(a)    ( min_element((a).begin(), (a).end()) - (a).begin())
#define maxi(a)    ( max_element((a).begin(), (a).end()) - (a).begin())
#define lowb(a, x) ( lower_bound((a).begin(), (a).end(), (x)) - (a).begin())
#define uppb(a, x) ( upper_bound((a).begin(), (a).end(), (x)) - (a).begin())

template<typename T>             vector<T>& operator--            (vector<T> &v){for (auto& i : v) --i;            return  v;}
template<typename T>             vector<T>& operator++            (vector<T> &v){for (auto& i : v) ++i;            return  v;}
template<typename T>             istream& operator>>(istream& is,  vector<T> &v){for (auto& i : v) is >> i;        return is;}
template<typename T>             ostream& operator<<(ostream& os,  vector<T>  v){for (auto& i : v) os << i << ' '; return os;}
template<typename T, typename U> pair<T,U>& operator--           (pair<T, U> &p){--p.first; --p.second;            return  p;}
template<typename T, typename U> pair<T,U>& operator++           (pair<T, U> &p){++p.first; ++p.second;            return  p;}
template<typename T, typename U> istream& operator>>(istream& is, pair<T, U> &p){is >> p.first >> p.second;        return is;}
template<typename T, typename U> ostream& operator<<(ostream& os, pair<T, U>  p){os << p.first << ' ' << p.second; return os;}
template<typename T, typename U> pair<T,U> operator-(pair<T,U> a, pair<T,U> b){return mp(a.first-b.first, a.second-b.second);}
template<typename T, typename U> pair<T,U> operator+(pair<T,U> a, pair<T,U> b){return mp(a.first+b.first, a.second+b.second);}
template<typename T, typename U> void umin(T& a, U b){if (a > b) a = b;}
template<typename T, typename U> void umax(T& a, U b){if (a < b) a = b;}

#ifdef HOME
#define SHOW_COLORS
#include "/mnt/c/Libs/tools/print.cpp"
#else
#define show(...) void(0)
#define debugf(fun)   fun
#define debugv(var)   var
#define mclock    void(0)
#define shows     void(0)
#define debug  if (false)
#define OSTREAM(...)    ;
#define OSTREAM0(...)   ;
#endif

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);

    int n;
    cin >> n;
    auto is_vowel = [](char c) {
        return c == 'O' || c == 'I' || c == 'U' || c == 'Y' || c == 'E' || c == 'A';
    };

    const int inf = 1e9;
    array<int, 3> dp;
    dp.fill(inf);
    dp[0] = 0;

    string s;
    for (int i = 0; i < n; ++i) {
        array<int, 3> nx;
        nx.fill(inf);
        cin >> s;
        if (s.size() > 3) s.resize(3);
        int pref = 0, suf = 0;
        bool was = false;
        for (int i = 0; i < s.size(); ++i) {
            if (is_vowel(s[i])) {
                was = true;
                suf = 0;
            } else {
                ++suf;
                if (!was) ++pref;
            }
            for (int k = 0; k + pref < 3; ++k) {
                auto& e = nx[suf + (was ? 0 : k)];
                e = min(e, dp[k] + i + 1);
            }
        }
        swap(nx, dp);
    }
    int ans = mine(dp);
    if (ans >= inf)
        cout << "*\n";
    else
        cout << ans << '\n';

    return 0;
}