/* -*- coding: utf-8 -*-
 *
 * 3644.cc:  No.3644 Division by Shitoshitoto Sequence - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

const int MAX_N = 100000;
const int MAX_N5 = MAX_N * 5;

/* typedef */

/* global variables */

int as[MAX_N5];

/* subroutines */

bool stt(int xs[]) {
  return
    xs[0] == xs[2] && xs[1] == xs[3] && xs[1] == xs[4] && xs[0] != xs[1];
}

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d", &n);
    int n5 = n * 5;
    for (int i = 0; i < n5; i++) scanf("%d", as + i);

    bool ok = true;
    for (int i = 0; ok && i < n5; i += 5) ok = stt(as + i);

    if (ok) puts("Yes");
    else puts("No");
  }

  return 0;
}