use std::{
    collections::{BTreeSet, HashMap, HashSet, VecDeque},
    fmt::Debug,
    io::stdin,
    str::FromStr,
    sync::OnceLock,
};

use proconio::marker::Chars;

fn main() {
    proconio::input! {
        n: u32,
        t: u32,
        a: [u32; n],
    }
    let result = f(a[0], t, &mut Vec::new(), &a[1..]).unwrap();
    let result = result
        .into_iter()
        .map(|o| match o {
            Op::Plus => '+',
            Op::Mult => '*',
        })
        .collect::<String>();
    println!("{result}");
}

#[derive(Debug, Clone, Copy)]
enum Op {
    Plus,
    Mult,
}
fn f(v: u32, t: u32, op: &mut Vec<Op>, a: &[u32]) -> Option<Vec<Op>> {
    if a.is_empty() {
        return (v == t).then(|| op.clone());
    }
    if v >= t {
        return None;
    }
    op.push(Op::Plus);
    let plus_v = v + a[0];
    if let Some(r) = f(plus_v, t, op, &a[1..]) {
        return Some(r);
    }
    op.pop();
    op.push(Op::Mult);
    let mult_v = v * a[0];
    if let Some(r) = f(mult_v, t, op, &a[1..]) {
        return Some(r);
    }
    op.pop();
    None
}