1992D - Test of Love - CodeForces Solution

for i in range(int(input())):
	a,b,c = map(int,input().split())
	s = input()
	n = b-1
	t = 0
	w = 0
	for i in s:
		if i == "L":
			n = b
		elif i =="W":
			if n <=0:
				w+=1
		else:
			if n <= 0:
				t+=1
		n -=1
	if w > c:
		t+=1
	if t!=0:
		print("NO")
	else:
		print("YES")