#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;

typedef modint998244353 mint;
typedef long long ll;

void dfs(int n, vector<double> v){
	if (n == 1){
		if (abs(v[0] - 0.5) < 0.001) cout << v[0] << endl;
		return;
	}

	for (int i=0; i<n-1; i++){
		vector<double> tmp;
		for (int j=0; j<i; j++){
			tmp.push_back(v[j]);
		}
		tmp.push_back((v[i] + v[i+1]) / 2);
		for (int j=i+2; j<n; j++){
			tmp.push_back(v[j]);
		}
		dfs(n-1, tmp);
	}
}

void solve(){
	int n; cin >> n;
	vector<int> a(n);
	for (int i=0; i<n; i++){
		cin >> a[i];
	}
	int mode = 0;
	for (int i=0; i<n; i++){
		mode |= 1 << a[i];
	}
	if (mode != 3){
		cout << "No\n";
		return;
	}
	vector<int> runlength;
	int var = -1;
	int cnt = 0;
	for (int i=0; i<n; i++){
		if (var != a[i]){
			if (var != -1){
				runlength.push_back(cnt);
			}
			var = a[i];
			cnt = 1;
		}else{
			cnt++;
		}
	}
	runlength.push_back(cnt);
	int m = runlength.size();
	for (int i=1; i<m-1; i++){
		if (runlength[i] > 1){
			cout << "Yes\n";
			return;
		}
	}
	if (m % 2 == 0){
		cout << "Yes\n";
	}else if (m <= 7){
		cout << "No\n";
	}else{
		cout << "Yes\n";
	}
}

int main(){
	int t; cin >> t;
	while(t--) solve();
}