n, h, x = map(int,input().split())
G = int(input())
g = list(map(int,input().split()))
B = int(input())
b = list(map(int,input().split()))
score = [0] * n
for i in range(G): score[g[i]-1] = 1
for i in range(B): score[b[i]-1] = -1
dp = [[10 ** 9 for i in range(201)] for j in range(n+1)]
dp[0][100] = 0
for i in range(n):
	for j in range(201):
		if not (0 <= j+score[i] <= 200): continue
		if i+1-x < 0:
			dp[i+1][j+score[i]] = dp[i][j]
		else:
			dp[i+1][j+score[i]] = min(dp[i+1-x][j]+1, dp[i][j])

ans = -200
for i in range(201):
	if dp[n][i] <= h:
		ans = max(ans, i - 100)

print(ans)