Solve the programming task below in a Python markdown code block.
N candidates (numbered from 1 to N) join Chef's firm. The first 5 candidates join on the first day, and then, on every subsequent day, the next 5 candidates join in.  
For example, if there are 12 candidates, candidates numbered 1 to 5 will join on day 1, candidates numbered 6 to 10 on day 2 and the remaining 2 candidates will join on day 3.

Candidate numbered K decided to turn down his offer and thus, Chef adjusts the position by shifting up all the higher numbered candidates. This leads to a change in the joining day of some of the candidates.

Help Chef determine the number of candidates who will join on a different day than expected.

------ Input Format ------ 

- First line will contain T, number of test cases. Then the test cases follow.
- Each test case contains of a single line of input, two space-separated integers N and K denoting the number of candidates and the candidate who turned down the offer.

------ Output Format ------ 

For each test case, output a single integer denoting the number of candidates whose joining day will be changed.

------ Constraints ------ 

$1 ≤ T ≤ 1000$
$2 ≤ N ≤ 1000$
$1 ≤ K ≤ N$

----- Sample Input 1 ------ 
4
7 3
6 6
2 1
14 2
----- Sample Output 1 ------ 
1
0
0
2

----- explanation 1 ------ 
Test case $1$: The original joining day of each candidate is given as $[1, 1, 1, 1, 1, 2, 2]$ but as candidate $3$ turns down his offer, the new joining days are now $[1, 1, NA, 1, 1, 1, 2]$. Candidate numbered $6$ is the only one to have his joining day changed.

Test case $2$: The original joining day of each candidate is given as $[1, 1, 1, 1, 1, 2]$ but as candidate $6$ turns down his offer, the new joining days are now $[1, 1, 1, 1, 1, NA]$. No candidate got his joining day changed.

Test case $3$: The original joining day of each candidate is given as $[1, 1]$ but as candidate $1$ turns down his offer, the new joining days are now $[NA, 1]$. No candidate got his joining day changed.

Test case $4$: The original joining day of each candidate is given as $[1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3]$ but as candidate $2$ turns down his offer, the new joining days are now $[1, NA, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3]$. Candidate numbered $6$ and $11$ are the only ones to have their joining days changed.