#define LOCAL
#include <bits/stdc++.h>
using namespace std;
#pragma region Macros
typedef long long ll;
typedef __int128_t i128;
typedef unsigned int uint;
typedef unsigned long long ull;
#define ALL(x) (x).begin(), (x).end()

template <typename T> istream& operator>>(istream& is, vector<T>& v) {
    for (T& x : v) is >> x;
    return is;
}
template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
    for (int i = 0; i < (int)v.size(); i++) {
        os << v[i] << (i + 1 == (int)v.size() ? "" : " ");
    }
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << '(' << p.first << ',' << p.second << ')';
    return os;
}
template <typename T, typename U, typename V> ostream& operator<<(ostream& os, const tuple<T, U, V>& t) {
    os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ')';
    return os;
}
template <typename T, typename U, typename V, typename W> ostream& operator<<(ostream& os, const tuple<T, U, V, W>& t) {
    os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ',' << get<3>(t) << ')';
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& m) {
    os << '{';
    for (auto itr = m.begin(); itr != m.end();) {
        os << '(' << itr->first << ',' << itr->second << ')';
        if (++itr != m.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const unordered_map<T, U>& m) {
    os << '{';
    for (auto itr = m.begin(); itr != m.end();) {
        os << '(' << itr->first << ',' << itr->second << ')';
        if (++itr != m.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const set<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const multiset<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const unordered_set<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const deque<T>& v) {
    for (int i = 0; i < (int)v.size(); i++) {
        os << v[i] << (i + 1 == (int)v.size() ? "" : " ");
    }
    return os;
}

void debug_out() { cerr << '\n'; }
template <class Head, class... Tail> void debug_out(Head&& head, Tail&&... tail) {
    cerr << head;
    if (sizeof...(Tail) > 0) cerr << ", ";
    debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...)                                                                   \
    cerr << " ";                                                                     \
    cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n'; \
    cerr << " ";                                                                     \
    debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

template <typename T> T gcd(T x, T y) { return y != 0 ? gcd(y, x % y) : x; }
template <typename T> T lcm(T x, T y) { return x / gcd(x, y) * y; }

template <class T1, class T2> inline bool chmin(T1& a, T2 b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template <class T1, class T2> inline bool chmax(T1& a, T2 b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
#pragma endregion

const int INF = 1e9;
const long long IINF = 1e18;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
const char dir[4] = {'D', 'R', 'U', 'L'};
const long long MOD = 1000000007;
// const long long MOD = 998244353;

bool kadomatsu(const vector<int>& v) {
    if (v[0] == v[1]) return false;
    if (v[1] == v[2]) return false;
    if (v[2] == v[0]) return false;
    return min({v[0], v[1], v[2]}) == v[1] || max({v[0], v[1], v[2]}) == v[1];
}

void solve() {
    int N;
    cin >> N;
    vector<int> A(N);
    cin >> A;

    auto check = [&](int i) {
        if (i < 0 || i + 2 >= N) return true;
        if (A[i] == A[i + 1]) return false;
        if (A[i + 1] == A[i + 2]) return false;
        if (A[i + 2] == A[i]) return false;
        return min({A[i], A[i + 1], A[i + 2]}) == A[i + 1] || max({A[i], A[i + 1], A[i + 2]}) == A[i + 1];
    };

    auto whole = [&]() {
        for (int i = 0; i + 2 < N; i++) {
            if (!check(i)) {
                return false;
            }
        }
        return true;
    };

    vector<bool> ng(N, false);
    for (int i = 0; i + 2 < N; i++) {
        if (!check(i)) {
            for (int j = 0; j < 3; j++) {
                ng[i + j] = true;
            }
        }
    }
    vector<int> cand;
    for (int i = 0; i < N; i++) {
        if (ng[i]) {
            cand.emplace_back(i);
        }
    }

    if (cand.size() > 20) {
        cout << "No" << '\n';
        return;
    }

    for (int i = 0; i < cand.size(); i++) {
        for (int j = i + 1; j < cand.size(); j++) {
            if (A[cand[i]] == A[cand[j]]) continue;
            swap(A[cand[i]], A[cand[j]]);
            if (whole()) {
                cout << "Yes" << '\n';
                return;
            }
            swap(A[cand[i]], A[cand[j]]);
        }
    }

    if (cand.size() > 5) {
        cout << "No" << '\n';
        return;
    }

    auto SWAP = [&](int x, int y) {
        for (int i : {-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5}) {
            if (!check(x + i)) return false;
            if (!check(y + i)) return false;
        }
        return true;
    };

    for (int x : cand) {
        for (int i = 0; i < N; i++) {
            if (ng[i]) continue;
            if (A[x] == A[i]) continue;
            swap(A[x], A[i]);
            if (SWAP(x, i)) {
                cout << "Yes" << '\n';
                return;
            }
            swap(A[x], A[i]);
        }
    }

    cout << "No" << '\n';
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int T;
    cin >> T;
    for (; T--;) solve();
    return 0;
}