#1369
#import sys;input = lambda: sys.stdin.readline().rstrip()
#import heapq
#from collections import deque
#import numpy as np
#from collections import Counter as cnt
#from collections import defaultdict as ddc
#from math import factorial as fct
#from math import gcd
#from bisect import bisect_left as bsl
#from bisect import bisect_right as bsr
#from itertools import accumulate as acc
#from itertools import combinations as cmb
#from itertools import permutations as pmt
#from itertools import product as prd
#from functools import reduce as red
#import sys
#sys.setrecursionlimit(10**9)  #再帰を多く使う(デフォルトは1000)
def kadomatsu(L):
    """kadomatsuならTrueを返す"""
    if len(set(L)) == 3 and L[1] in {min(L), max(L)}:
        return True
    return False
    
for _ in range(int(input())):
    n = int(input())
    A = list(map(int,input().split()))
    Sub = [A[i:i+3] for i in range(n-2)]
    Nk, ct, bct, B, b = [], 0, 0, [], 0  #bが0ならイエス、1ならノー
    for i, S in enumerate(Sub):
        if not kadomatsu(S):
            if Nk == []:
                ct += 1
                bct = i
                B.append(i)
            else:
                if bct+2 < i:
                    ct += 1
                    bct = i
                    B.append(i)
            if ct > 2:
                b = 1
                break
            Nk.append(i)
    if ct == 1:
        b0 = B[0]
        b = 1
        for i in range(min(3, n-b0)):
            for j in range(n):
                if A[b0+i] != A[j]:
                    X = [a for a in A]
                    X[b0+i], X[j] = X[j], X[b0+i]
                    if all([kadomatsu(X[b0+i+k:b0+i+k+3]) for k in range(max(-2, -b0-i), min(3, n-3-b0-i))]):
                        if all([kadomatsu(X[j+k:j+k+3]) for k in range(max(-2, -j), min(3, n-3-j))]):
                            b = 0
        pass
    if ct == 2:
        b0, b1 = B
        b = 1
        for i in range(3):
            for j in range(min(3, n-b1)):
                if A[b0+i] != A[b1+j]:
                    X = [a for a in A]
                    X[b0+i], X[b1+j] = X[b1+j], X[b0+i]
                    if all([kadomatsu(X[b0+i+k:b0+i+k+3]) for k in range(max(-2, -b0-i), min(3, n-3-b0-i))]):
                        if all([kadomatsu(X[b1+j+k:b1+j+k+3]) for k in range(max(-2, -b1-j), min(3, n-3-b1-j))]):
                            b = 0
    print('YNeos'[b::2])