use proconio::{input, marker::Usize1};

fn main() {
    input! {
        mut n:usize,
        mut k:Usize1,
    }

    let mut ans = vec![];
    while n > 0 {
        ans.push(k % (n % 10 + 1));
        k /= n % 10 + 1;
        n /= 10;
    }
    ans.reverse();

    if ans.iter().all(|x| *x == 0) {
        println!("0");
    } else {
        for x in ans.iter().skip_while(|x| **x == 0) {
            print!("{}", *x);
        }
        println!()
    }
}