Key Pair
Problem :
 https://practice.geeksforgeeks.org/problems/key-pair/0
Solution

	#code
	T=int(input())#Test cases
	for t in range(0,T):#looping through all test cases
	N_X = [int(x) for x in input().split()]
	flag=0
	A=[int(y) for y in input().split()]#read elements separated by space
	for a in range(N_X[0]):
	if N_X[1]-A[a] in A:#if number complement found in A[] print yes
	print("Yes")
	flag=1
	break
	if(flag==0):
	print("No")

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