"""

離散して3箇所以上ある場合は不可能

"""

from sys import stdin
import sys

def kd(L):
    if L[0]==L[1] or L[1]==L[2] or L[2]==L[0]:
        return False
    elif max(L) == L[1] or min(L) == L[1]:
        return True
    else:
        return False


def kdl(L):
    for i in range(len(L)-2):
        if not kd(L[i:i+3]):
            return False
    return True


TT = int(stdin.readline())

for loop in range(TT):


    N = int(stdin.readline())
    A = list(map(int,stdin.readline().split()))
    
    nonKD = []

    cnt = 0
    while cnt < N-2:
        if not kd( A[cnt:cnt+3] ):
            nonKD.append(cnt)
            cnt += 2
        cnt += 1

    if len(nonKD) >= 3:
        print ("No")
        continue

    if len(nonKD) == 2:
        ans = "No"
        l = nonKD[0]
        r = nonKD[1]
        for i in range(3):
            for j in range(3):
                A[l+i],A[r+j] = A[r+j],A[l+i]
                if kdl(A[max(0,l-2):l+5]) and kdl(A[max(0,r-2):r+5]):
                    ans = "Yes"
                A[l+i],A[r+j] = A[r+j],A[l+i]
        print (ans)

    else:
        ans = "No"
        l = nonKD[0]
        for i in range(3):
            for j in range(N):
                A[l+i],A[j] = A[j],A[l+i]
                if kdl(A[max(0,l-2):l+5]) and kdl(A[max(0,j-2):j+3]):
                    ans = "Yes"
                A[l+i],A[j] = A[j],A[l+i]
        print (ans)