def is_shitoshitoto(X):
    return X[0] == X[2] and X[1] == X[3] == X[4] and X[0] != X[1]


def solve():
    N = int(input())
    A = [int(s) for s in input().split()]

    print("Yes" if all(is_shitoshitoto(A[5 * i : 5 * i + 5]) for i in range(N)) else "No")


if __name__ == "__main__":
    T = int(input())

    for _ in range(T):
        solve()