Problem N
Incognito
Input
On the first line one positive number: the number of test cases, at most 100. After that per test case:

one line with an integer $n$ ($0\le n \le 30$): the number of available attributes.

$n$ lines with two spaceseparated strings: the name and the category of the attribute.
All strings consist of at least $1$ and at most $20$ lowercase letters. Within a test case all names are distinct.
Output
Per test case:

one line with an integer: the number of possible distinct disguises that can be made with the given attributes, such that at most one attribute from each category is used.
Sample Input 1  Sample Output 1 

2 3 hat headgear sunglasses eyewear turban headgear 3 mask face sunglasses face makeup face 
5 3 