def tekitou_validation():
	h, w, k = map(int,input().split())
	assert 1 <= h <= 10 ** 9
	assert 1 <= w <= 10 ** 9
	assert 0 <= k <= min(h*w, 2 * 10 ** 3)
	s = set()
	for _ in range(k):
		xi,yi,d = input().split()
		assert xi.isdigit()
		assert yi.isdigit()
		assert d=="R" or d=="L" or d=="U" or d=="D"
		x = int(xi)
		y = int(yi)
		assert 0 <= x < h
		assert 0 <= y < w
		assert (x,y)not in s
		s.add((x,y))
	


T = int(input())
assert 1 <= T <= 100
for i in range(T):
	tekitou_validation()