Problem: The evil mastermind, Moriarty, strikes again!  He sent Sherlock an image of a wall, with N integers painted on it. Sherlock is asked to solve the puzzle and find the next clue.
Sherlock knows that Moriarty is a deceitful person. All the numbers painted on the wall are not valid. Only the numbers that are Coprime with the integer X are valid, and the rest are a deceit. Help Sherlock find the valid integers from the given array A so that he can track down Moriarty.  

Input:
First line contains T. T test cases follow.
First line of each test case contains two space-separated integers N and X.
Second line of each test case contains N space-separated integers, forming the array A. 

Output:
Print the valid integers separated by spaces in the order that they appear in the list or "-1" (without the quotes) if there are no valid integers, in a new line for each test case.  

Constraints:
1 ≤ T ≤ 10
1 ≤ N ≤ 10^4
2 ≤ Ai, X ≤ 10^7

SAMPLE INPUT
1
5 4
2 5 8 3 13

SAMPLE OUTPUT
5 3 13

Solution (in PYTHON):

Solution:
'''
# Read input from stdin and provide input before running code

name = raw_input('What is your name?\n')
print 'Hi, %s.' % name
'''

def gcd(a,b) :
	if b == 0 :
		return a
	else :
		return gcd(b,a%b)


t = int(raw_input())

while t>0 :
	t -= 1
	n,m = map(int, raw_input().split())
	s = []
	c=0
	ip1=map(int, raw_input().split())
	for i in range(0,n):
		if(gcd(ip1[i],m) == 1):
			s.append(ip1[i])
			c+=1
	if c==0 :
		print '-1'
	else :
		for i in range(0,c-1):
			print (s[i]),
		print s[c-1]