from collections import defaultdict

MOD = 10 ** 9 + 7
N, K = map(int, input().split())
A = list(map(int, input().split()))
A.sort()
dic = defaultdict(int)
dic[(0, 0)] = 1
ans = 0
for i, a in enumerate(A):
    tmp = pow(2, N - i - 1, MOD)
    for (x, y), v in list(dic.items()):
        if y + a >= K * (x + 1):
            ans += v * tmp
            ans %= MOD
        elif y + a + 100 * (N - i - 1) < K * (x + N - i):
            continue
        else:
            dic[(x + 1, y + a)] += v
            dic[(x + 1, y + a)] %= MOD
print(ans)