import sys
from itertools import accumulate

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 19
MOD = 10 ** 9 + 7
EPS = 10 ** -10

N, M = MAP()
V = LIST()
R = LIST()
L, H = MAP()
MX = 100000

dp1 = list2d(2, MX+1, 0)
dp1[0][0] = 1
for i, v in enumerate(V):
    for j in range(MX+1):
        if dp1[i&1][j]:
            dp1[(i+1)&1][j] += dp1[i&1][j]
            dp1[(i+1)&1][j+v] += dp1[i&1][j]
            dp1[(i+1)&1][j] %= MOD
            dp1[(i+1)&1][j+v] %= MOD
            dp1[i&1][j] = 0

dp2 = list2d(2, MX+1, 0)
dp2[0][0] = 1
for i, r in enumerate(R):
    for j in range(MX+1):
        if dp2[i&1][j]:
            dp2[(i+1)&1][j] += dp2[i&1][j]
            dp2[(i+1)&1][j+r] += dp2[i&1][j]
            dp2[(i+1)&1][j] %= MOD
            dp2[(i+1)&1][j+r] %= MOD
            dp2[i&1][j] = 0

acc = list(accumulate(dp1[N&1]))
ans = 0
for r, cnt in enumerate(dp2[M&1]):
    if r == 0:
        continue
    lowv = L * r
    hiv = H * r
    if lowv == 0 or hiv > MX:
        continue
    ans += cnt * (acc[hiv] - acc[lowv-1])
    ans %= MOD
print(ans)