n,K = map(int,input().split())
a = list(map(int,input().split()))
dp = [[[0]*(100*n+1) for i in range(n+1)] for j in range(n+1)]
dp[0][0][0] = 1
mod = 10**9+7

for i in range(n):
    for j in range(i+1):
        x = a[i]
        for k in range(100*(i+1)+1):
            if dp[i][j][k] > 0:
                dp[i+1][j+1][k+x] += dp[i][j][k]
                dp[i+1][j+1][k+x] %= mod
            dp[i+1][j][k] += dp[i][j][k]
            dp[i+1][j][k] %= mod
ans = 0
for i in range(1,n+1):
    for j in range(100*n+1):
        if i*K <= j:
            ans += dp[-1][i][j]
            ans %= mod
print(ans)