You are given 3 different array A,B and C of same size N. Find number of index i such that:
A_i=B_i+C_k
where k can lie between [1,N].

Input:
The first line of the input contains an integer T, denoting number of test cases. The first line of each test case contains an integer N denoting the size of the array. The next 3 line of the contains N space separated integers each, of the array A, B and C respectively.

Output:
For each test case, print the count of number of such index which satisfies the given condition.

Constraints:
1<=T<=4.7*10^3
1<=N<=300
1<=A_i,B_i<=100
-100<=C_i<=100

Example:
Input
1
3
1 2 3
3 2 4
0 5 -2
Output
2

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