"""

使うべきなのは、落単を飛び越える時だけ

とりあえず、長さX以上の合間はXにしていい

2乗になった

"""

import sys
from sys import stdin

N,H,X = map(int,stdin.readline().split())

gnum = int(stdin.readline())
G = list(map(int,stdin.readline().split()))

bnum = int(stdin.readline())
B = list(map(int,stdin.readline().split()))


GB = []

for i in range(gnum):
    GB.append( (G[i],1) )

for i in range(bnum):
    GB.append( (B[i],-1) )

GB.sort()


lis = [0]
last = 0

for i in range(len(GB)):

    v,c = GB[i]

    for j in range(last+1,min(last+X+1,v)):
        lis.append(0)

    lis.append(c)
    last = v

for j in range(last+1,min(last+X+1,N+1)):
    lis.append(0)

#print (lis)

N = len(lis)
dp = [[float("-inf")] * min(H+1,len(lis)//X+2) for i in range(N)]
M = len(dp[0])

dp[0][0] = 0
s = lis

for i in range(N-1):

    for j in range(M):

        if dp[i][j] == float("-inf"):
            continue

        
        if dp[i+1][j] < dp[i][j] + s[i+1]:
            dp[i+1][j] = dp[i][j] + s[i+1]

        if i+X < N and j != M-1 and dp[i+X][j+1] < dp[i][j] + s[i+X]:
            dp[i+X][j+1] = dp[i][j] + s[i+X]

ans = float("-inf")
for j in range(M):
    ans = max(ans , dp[-1][j])

#print (dp)
print (ans)