#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define each(e, v) for(auto &e: v)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const int MOD = 1000000007;
//const int MOD = 998244353;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;};
template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;};

struct io_setup{
    io_setup(){
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout << fixed << setprecision(15);
    }
} io_setup;

bool judge(vector<int> v){
    vector<int> u = v;
    sort(all(v));
    if(v[0] == v[1] || v[1] == v[2]) return false;
    return (u[1] == v[0] || u[1] == v[2]);
}

bool judge2(vector<int> v){
    int N = sz(v);
    rep(i, N-2){
        vector<int> u = {v[i], v[i+1], v[i+2]};
        if(!judge(u)) return false;
    }

    return true;
}

int main(){
    int T; cin >> T;

    while(T--){
        int N; cin >> N;
        vector<int> a(N);
        rep(i, N) cin >> a[i];

        vector<int> ngs;
        rep(i, N-2){
            vector<int> u = {a[i], a[i+1], a[i+2]};
            if(!judge(u)) ngs.eb(i);
        }

        if(sz(ngs) > 6) {cout << "No\n"; continue;}
        vector<bool> c(N, false);
        each(e, ngs){
            rep(i, 3) c[e+i] = true;
        }

        vector<int> check;
        rep(i, N) if(c[i]) check.eb(i);

        //if(sz(check) > 10) {cout << "No\n"; continue;}

        int n = sz(check);
        bool ans = false;
        rep(i, n){
            rep(j, i){
                swap(a[check[i]], a[check[j]]);
                if(judge2(a)) ans = true;
                swap(a[check[i]], a[check[j]]);
            }
        }

        cout << (ans? "Yes\n" : "No\n");
    }
}