Solve the programming task below in a Python markdown code block.
Read problem statements in [Bengali], [Mandarin Chinese], [Russian], and [Vietnamese] as well.

You are an administrator of a popular quiz website. Every day, you hold a quiz on the website.

There are $N$ users (numbered $1$ through $N$) and $M$ admins (numbered $N+1$ through $N+M$). For each quiz, each user is allowed to attempt it at most once. Sometimes, admins attempt the quizzes for testing purposes too; an admin may attempt a quiz any number of times.

On a certain day, the quiz was attempted $K$ times. For each $i$ ($1 ≤ i ≤ K$), the $i$-th of these attempts was made by the person with number $L_{i}$. Find all the users who attempted the quiz more than once, in order to disqualify them.

------  Input ------
The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows.
The first line of each test case contains three space-separated integers $N$, $M$ and $K$.
The second line contains $K$ space-separated integers $L_{1}, L_{2}, \ldots, L_{K}$.

------  Output ------
For each test case, print a single line containing an integer $D$ denoting the number of users who should be disqualified, followed by a space and $D$ space-separated integers denoting their numbers in ascending order.

------  Constraints ------
$1 ≤ T ≤ 10$
$0 ≤ N, M ≤ 10^{5}$
$1 ≤ N + M, K ≤ 10^{5}$
$1 ≤ L_{i} ≤ N + M$ for each valid $i$

----- Sample Input 1 ------ 
3

1 1 1

1

1 1 2

1 1

5 5 10

2 5 2 5 2 4 10 10 10 10
----- Sample Output 1 ------ 
0

1 1

2 2 5
----- explanation 1 ------ 
Example case 1: Since there is only a single attempt during the whole day, there cannot be any user who made more than one attempt.

Example case 2: User $1$ attempted the quiz twice.

Example case 3: Users $2$ and $5$ attempted the quiz multiple times. The admin with number $10$ also attempted the quiz multiple times, but admins are allowed to do that.