use std::collections::HashMap;

const MOD: usize = 1e9 as usize + 7;

fn main() {
    let mut nk = String::new();
    std::io::stdin().read_line(&mut nk).ok();
    let nk: Vec<usize> = nk.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nk[0];
    let k = nk[1];
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    let mut dp = vec![HashMap::new(); n+1];
    dp[0].insert(0usize, 1usize);
    for i in 0..n {
        let mut next_dp = vec![HashMap::new(); n+1];
        for j in 0..=n {
            for (&sumval, &cnt) in dp[j].iter() {
                *next_dp[j].entry(sumval).or_insert(0usize) += cnt;
                *next_dp[j].entry(sumval).or_insert(0usize) %= MOD;
                *next_dp[j+1].entry(sumval+a[i]).or_insert(0usize) += cnt;
                *next_dp[j+1].entry(sumval+a[i]).or_insert(0usize) %= MOD;
            }
        }
        dp = next_dp;
    }
    let result = dp.iter().enumerate().skip(1)
        .map(|(i, v)| v.iter().filter(|&(&sumval, _)| sumval >= i*k).map(|(_, &cnt)| cnt).sum::<usize>())
        .sum::<usize>() % MOD;
    println!("{}", result);
}