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

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    int t;
    cin >> t;
    rep(ti, 0, t) {
        int n;
        cin >> n;
        vector<int> a(n * 5);
        rep(i, 0, n * 5) cin >> a[i];
        string ans = "Yes";
        for(int i = 0; i < n * 5; i += 5) {
            set<int> st;
            rep(j, 0, 5) st.insert(a[i + j]);
            if(!(st.size() == 2 && a[i] == a[i + 2] 
                && a[i + 1] == a[i + 3] && a[i + 3] == a[i + 4])) {
                    ans = "No";
                    break;
            }
        }
        cout << ans << endl;
    }
}