MOD = 10 ** 9 + 7
n, k = map(int, input().split())
a = list(map(lambda x: int(x)-k, input().split()))
dp = [[0]*20010 for _ in range(n + 1)]
dp[0][0] = 1
for i in range(n):
    for j in range(len(dp[i])):
        dp[i + 1][j] += dp[i][j] % MOD
        dp[i + 1][(j + a[i]) % len(dp[i])] += dp[i][j] % MOD
ans = -1
for i in range(10001):
    ans += dp[n][i]
print(ans % MOD)