#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define db double
#define pii pair<int,int>
#define pli pair<ll,int>
#define pil pair<int,ll>
#define pll pair<ll,ll>
#define ti3 tuple<int,int,int>
#define int128 __int128_t
#define pii128 pair<int128,int128>
const int inf = 1 << 30;
const ll linf = 1e18;
const db EPS = 1e-10;
const db pi = acos(-1);
template<class T> bool chmin(T& x, T y){
    if(x > y) {
        x = y;
        return true;
    } else return false;
}
template<class T> bool chmax(T& x, T y){
    if(x < y) {
        x = y;
        return true;
    } else return false;
}

// overload macro
#define CAT( A, B ) A ## B
#define SELECT( NAME, NUM ) CAT( NAME, NUM )

#define GET_COUNT( _1, _2, _3, _4, _5, _6 /* ad nauseam */, COUNT, ... ) COUNT
#define VA_SIZE( ... ) GET_COUNT( __VA_ARGS__, 6, 5, 4, 3, 2, 1 )

#define VA_SELECT( NAME, ... ) SELECT( NAME, VA_SIZE(__VA_ARGS__) )(__VA_ARGS__)

// rep(overload)
#define rep( ... ) VA_SELECT(rep, __VA_ARGS__)
#define rep2(i, n) for (int i = 0; i < int(n); i++)
#define rep3(i, a, b) for (int i = a; i < int(b); i++)
#define rep4(i, a, b, c) for (int i = a; i < int(b); i += c)

// repll(overload)
#define repll( ... ) VA_SELECT(repll, __VA_ARGS__)
#define repll2(i, n) for (ll i = 0; i < (ll)(n); i++)
#define repll3(i, a, b) for (ll i = a; i < (ll)(b); i++)
#define repll4(i, a, b, c) for (ll i = a; i < (ll)(b); i += c)

// rrep(overload)
#define rrep( ... ) VA_SELECT(rrep, __VA_ARGS__)    
#define rrep2(i, n) for (int i = n - 1; i >= 0; i--)
#define rrep3(i, a, b) for (int i = b - 1; i >= a; i--)
#define rrep4(i, a, b, c) for (int i = b - 1; i >= a; i -= c)

// rrepll(overload)
#define rrepll( ... ) VA_SELECT(rrepll, __VA_ARGS__)
#define rrepll2(i, n) for (ll i = (ll)(n) - 1; i >= 0ll; i--)
#define rrepll3(i, a, b) for (ll i = b - 1; i >= (ll)(a); i--)
#define rrepll4(i, a, b, c) for (ll i = b - 1; i >= (ll)(a); i -= c)

// for_earh
#define fore(e, v) for (auto&& e : v)

// vector
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()

int N;
string W[1000010];
int dp[1000010][4][3];
vector<int> V[1000010];
string AEIOUY = "AEIOUY";
int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    cin >> N;
    rep (i, N) {
        cin >> W[i];
        rep (j, 4) rep(k, 3) dp[i][j][k] = inf;
        V[i].resize(W[i].size(), 0);
        rep (j, W[i].size()) {
            fore (u, AEIOUY) {
                V[i][j] |= u == W[i][j];
            }
        }
    }

    dp[0][0][0] = 0;
    rep (i, N) {
        rep (j, 4) {
            rep (k, 3) {
                if (dp[i][j][k] == inf) continue;
                // 次の文字列へ
                if (i + 1 < N && j > 0) {
                    if (V[i + 1][0]) {
                        chmin(dp[i + 1][1][0], dp[i][j][k] + 1);
                    } else if (k + 1 <= 2) {
                        chmin(dp[i + 1][1][k + 1], dp[i][j][k] + 1);
                    }
                }
                // 文字列を伸ばす
                if(j + 1 <= 3 && j < (int)W[i].size()) {
                    if (V[i][j]) {
                        chmin(dp[i][j + 1][0], dp[i][j][k] + 1); 
                    } else if (k + 1 <= 2) {
                        chmin(dp[i][j + 1][k + 1], dp[i][j][k] + 1);
                    }
                }
            }
        }
    }

    int ans = inf;
    rep (j, 1, 4) rep (k, 3) {
        chmin(ans, dp[N - 1][j][k]);
    }

    if (ans == inf) {
        cout << "*\n";
    } else {
        cout << ans << '\n';
    }
}