// ---------- begin Run Length Encoding ----------
fn run_length_encoding<T: Eq>(a: Vec<T>) -> Vec<(T, usize)> {
    let mut a = a.into_iter().map(|a| (a, 1)).collect::<Vec<_>>();
    a.dedup_by(|a, b| {
        a.0 == b.0 && {
            b.1 += a.1;
            true
        }
    });
    a
}
// ---------- end Run Length Encoding ----------
// ---------- begin scannner ----------
#[allow(dead_code)]
mod scanner {
    use std::str::FromStr;
    pub struct Scanner<'a> {
        it: std::str::SplitWhitespace<'a>,
    }
    impl<'a> Scanner<'a> {
        pub fn new(s: &'a String) -> Scanner<'a> {
            Scanner {
                it: s.split_whitespace(),
            }
        }
        pub fn next<T: FromStr>(&mut self) -> T {
            self.it.next().unwrap().parse::<T>().ok().unwrap()
        }
        pub fn next_bytes(&mut self) -> Vec<u8> {
            self.it.next().unwrap().bytes().collect()
        }
        pub fn next_chars(&mut self) -> Vec<char> {
            self.it.next().unwrap().chars().collect()
        }
        pub fn next_vec<T: FromStr>(&mut self, len: usize) -> Vec<T> {
            (0..len).map(|_| self.next()).collect()
        }
    }
}
// ---------- end scannner ----------

use std::io::Write;
use std::collections::*;

type Map<K, V> = BTreeMap<K, V>;
type Set<T> = BTreeSet<T>;
type Deque<T> = VecDeque<T>;

fn main() {
    use std::io::Read;
    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).unwrap();
    let mut sc = scanner::Scanner::new(&s);
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    run(&mut sc, &mut out);
}

fn run<W: Write>(sc: &mut scanner::Scanner, out: &mut std::io::BufWriter<W>) {
    /*
    let mut map = Map::new();
    map.insert(vec![1], vec![1f64]);
    map.insert(vec![0], vec![0f64]);
    for n in 2..20 {
        let mut a = vec![0; n];
        for i in (0..n).step_by(2) {
            a[i] = 1;
        }
        for _ in 0..2 {
            let b = a.clone();
            let mut s = vec![];
            for i in 1..n {
                let (l, r) = b.split_at(i);
                let l = Vec::from(l);
                let r = Vec::from(r);
                let x = &map[&l];
                let y = &map[&r];
                for x in x.iter() {
                    for y in y.iter() {
                        s.push((*x + *y) * 0.5);
                    }
                }
            }
            s.sort_by(|a, b| a.partial_cmp(b).unwrap());
            s.dedup_by(|a, b| (*a - *b).abs() < 1e-9);
            if s.iter().any(|s| (*s - 0.5).abs() < 1e-9) {
                println!("{}: {:?}", n, b);
            }
            map.insert(b, s);
            a.iter_mut().for_each(|a| *a ^= 1);
        }
    }
    */
    let t: u32 = sc.next();
    for _ in 0..t {
        let n: usize = sc.next();
        let a: Vec<i32> = sc.next_vec(n);
        let z = run_length_encoding(a);
        let ans = if z.len() >= 9 || z.len() % 2 == 0 || (z.len() > 1 && z.iter().any(|p| p.0 == z[1].0 && p.1 > 1)) {
            "Yes"
        } else {
            "No"
        };
        writeln!(out, "{}", ans).ok();
    }
}