编程题：Apple

There are a box of apples,which contains N apples. You're going to give them to M person. It is required that everyone must be given a positive integer apple, and no one must have the same amount. If it can be done, output "possible"; otherwise output "impossible".


### Input:
The first line contains a positive integerT（1≤T≤5）- the number of test cases.
In each of the following T lines there are two positive integers N,M.(1≤N≤1000000, 1≤M≤1000).

### Output:

For each test case output a line. If it can be done, output "possible"; otherwise output "impossible".


### Sample Input:


in
3
9 3
12 1
9 4


### Sample Output:

out
possible
possible
impossible







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