// ---------- begin ModInt ----------
const MOD: u32 = 1_234_567_891;

#[derive(Clone, Copy)]
struct ModInt(u32);

impl std::ops::Add for ModInt {
    type Output = ModInt;
    fn add(self, rhs: ModInt) -> Self::Output {
        let mut d = self.0 + rhs.0;
        if d >= MOD {
            d -= MOD;
        }
        ModInt(d)
    }
}

impl std::ops::AddAssign for ModInt {
    fn add_assign(&mut self, rhs: ModInt) {
        *self = *self + rhs;
    }
}

impl std::ops::Sub for ModInt {
    type Output = ModInt;
    fn sub(self, rhs: ModInt) -> Self::Output {
        let mut d = self.0 + MOD - rhs.0;
        if d >= MOD {
            d -= MOD;
        }
        ModInt(d)
    }
}

impl std::ops::SubAssign for ModInt {
    fn sub_assign(&mut self, rhs: ModInt) {
        *self = *self - rhs;
    }
}

impl std::ops::Mul for ModInt {
    type Output = ModInt;
    fn mul(self, rhs: ModInt) -> Self::Output {
        ModInt((self.0 as u64 * rhs.0 as u64 % MOD as u64) as u32)
    }
}

impl std::ops::MulAssign for ModInt {
    fn mul_assign(&mut self, rhs: ModInt) {
        *self = *self * rhs;
    }
}

impl std::ops::Neg for ModInt {
    type Output = ModInt;
    fn neg(self) -> Self::Output {
        ModInt(if self.0 == 0 {0} else {MOD - self.0})
    }
}

impl std::fmt::Display for ModInt {
    fn fmt<'a>(&self, f: &mut std::fmt::Formatter<'a>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

impl std::str::FromStr for ModInt {
    type Err = std::num::ParseIntError;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let val = s.parse::<u32>()?;
        Ok(ModInt::new(val))
    }
}

impl From<usize> for ModInt {
    fn from(val: usize) -> ModInt {
        ModInt((val % MOD as usize) as u32)
    }
}

#[allow(dead_code)]
impl ModInt {
    pub fn new(n: u32) -> ModInt {
        ModInt(n % MOD)
    }
    pub fn zero() -> ModInt {
        ModInt(0)
    }
    pub fn one() -> ModInt {
        ModInt(1)
    }
    pub fn pow(self, mut n: u32) -> ModInt {
        let mut t = ModInt::one();
        let mut s = self;
        while n > 0 {
            if n & 1 == 1 {
                t *= s;
            }
            s *= s;
            n >>= 1;
        }
        t
    }
    pub fn inv(self) -> ModInt {
        assert!(self.0 > 0);
        self.pow(MOD - 2)
    }
}
// ---------- end ModInt ----------

use std::io::Read;

fn mul(a: &[ModInt], b: &[ModInt], d: &[ModInt]) -> Vec<ModInt> {
    let len = d.len();
    let mut c = vec![ModInt::zero(); 2 * len];
    for (i, a) in a.iter().enumerate() {
        for (c, b) in c[i..].iter_mut().zip(b.iter()) {
            *c += *a * *b;
        }
    }
    for i in (len..(2 * len)).rev() {
        let v = c[i];
        for j in 1..len {
            c[i - j] -= v * d[j];
        }
    }
    c.truncate(len);
    c
}

fn run() {
    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let _n: usize = it.next().unwrap().parse().unwrap();
    let mut m: u64 = it.next().unwrap().parse().unwrap();
    let mut dp = vec![ModInt::one()];
    let mut pre = vec![ModInt::zero(); 50 * 500 + 1];
    pre[0] = ModInt::one();
    for s in it {
        let a: usize = s.parse().unwrap();
        for i in a..pre.len() {
            pre[i] = pre[i] + pre[i - a];
        }
        let mut next = dp.clone();
        for _ in 0..a {
            next.push(ModInt::zero());
        }
        for (next, dp) in next[a..].iter_mut().zip(dp.iter()) {
            *next -= *dp;
        }
        dp = next;
    }
    let len = dp.len();
    let mut t = vec![ModInt::zero(); len];
    let mut s = vec![ModInt::zero(); len];
    t[0] = ModInt::one();
    s[1] = ModInt::one();
    while m > 0 {
        if m & 1 == 1 {
            t = mul(&t, &s, &dp);
        }
        s = mul(&s, &s, &dp);
        m >>= 1;
    }
    let mut ans = ModInt::zero();
    for i in 0..len {
        ans += pre[i] * t[i];
    }
    println!("{}", ans);
}

fn main() {
    run();
}