n, h, x = map(int,input().split())
G = int(input())
g = set(map(int,input().split()))
B = int(input())
b = set(map(int,input().split()))
newb = set()

for a in b:
	for i in range(a-x, a+x+1):
		if 0 <= i <= n:
			newb.add(i)

ans_base = 0
for a in g:
	if a not in newb:
		ans_base += 1

m = len(newb)
score = [0] * m
newb_list = sorted(list(newb))
for i, a in enumerate(newb_list):
	if a in b:
		score[i] -= 1
	if a in g:
		score[i] += 1

r = min(B, h)
dp = [[- 10 ** 9 for i in range(r+1)] for j in range(m)]
dp[0][0] = 0
for i in range(1, m):
	for j in range(r+1):
		dp[i][j] = max(dp[i][j], dp[i-1][j] + score[i])
		if j >= 1 and i-x >= 0:
			dp[i][j] = max(dp[i][j], dp[i-x][j-1] + score[i])
	
ans = max(dp[m-1])

print(ans + ans_base)