T = int(input())

def kado():
    N = int(input())
    L = list(map(int, input().strip().split(" ")))
    total = 0
    for i in range(len(L)):
        if L[i] == 0:
            continue
        for j in range(i+1, len(L)):
            for k in range(j+1, len(L)):
                if L[i] == 0 or L[j] == 0 or L[k] == 0:
                    break
                if (L[i] != L[j]) and (L[j] != L[k]) and (L[k] != L[i]):
                    L[i] = L[j] = L[k] = 0
                    total += 1
    return total

print("\n".join([str(kado()) for i in range(T)]))