**Problem Description**

She hope you write a program to extract all numbers from the string.

The samples will provide more information.

**Input**

The first line of input is the number of testcases T.

The first line of each testcase contains a integer N : the string length

Then a line the string.

T <= 10

1<= n <= 100000

It is guaranteed that each number in string is no more than 1000000000.

**Output**

For each testcase, output two lines.

First line an integer means the count of number in strings.

Second line all the numbers from the string, separated with blank space.

**Sample Input**

2 9 3,1112,05 10 1A1baba1,0

**Sample Output**

3 3 1112 5 4 1 1 1 0

**Source**

2019绍兴市计算机技能竞赛