D :: Non-boring sequences

Time Limit: 10 Seconds    Memory Limit: 131072 KB

We were afraid of making this problem statement too boring, so we decided to keep it short. A sequence is called non-boring if its every connected subsequence contains a unique element, i.e. an element such that no other element of that subsequence has the same value.

Given a sequence of integers, decide whether it is non-boring.

Input

The first line of the input contains the number of test cases T. The descriptions of the test cases follow:

Each test case starts with an integer n (1 <= n <= 200 000) denoting the length of the sequence. In the next line the n elements of the sequence follow, separated with single spaces. The elements are non-negative integers less than 10^9.

Output

Print the answers to the test cases in the order in which they appear in the input. For each test case print a single line containing the word non-boring or boring.

Sample Input

4
5
1 2 3 4 5
5
1 1 1 1 1
5
1 2 3 2 1
5
1 1 2 1 1

Sample Output

non-boring
boring
non-boring
boring

Submit

Source: Central European Regional Contest 2012