T = int(input())

for _ in range(T):
    N = int(input())
    A = list(map(int,input().split()))

    dp = [0] * 3
    for a in A:
        dp[a] +=1
    flag = True
    for i in range(3):
        if dp[i] == 0:
            flag = False
    if not flag:
        print('No')
        continue
    n = 0
    for i in range(N):
        if A[i] == 0:
            n = i
            A = A[i:] + A[:i]
            break
    now = 1
    flag = True
    for i in range(1,N):
        if A[i] == 0:
            if now == 1:
                flag = False
                break
            else:
                now = 1
        elif A[i] == 1:
            pass
        else:
            if now == -1:
                flag = False
                break
            else:now = -1
    if now == 1:
        flag = False
    if flag:
        print('Yes')
    else:
        print('No')