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

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

    let digits = {
        let mut digits = vec![];
        let mut n = n;
        while n > 0 {
            digits.push(n % 10);
            n /= 10;
        }
        digits
    };

    let ans = {
        let mut ans = vec![];
        let mut k = k;
        for d in digits {
            ans.push(k % (d + 1));
            k /= d + 1;
        }
        let mut x = 0;
        for d in ans.iter().rev() {
            x = x * 10 + d;
        }
        x
    };

    println!("{ans}");
}