T=int(input())
assert 1<=T<=100,"constraint violation"
for i in range(T):
	D,A=map(int,input().split())
	assert 1<=D<=100,"constraint violation"
	assert 1<=A<=10**18,"constraint violation"
	X=list(map(int,input().split()))
	for j in X:
		assert 1<=j<=10**18,"constraint violation"
	print("ok")