use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: Vec<u64> = itr
        .next()
        .unwrap()
        .chars()
        .map(|c| c.to_digit(10).unwrap() as u64)
        .collect();
    let m: Vec<u64> = itr
        .next()
        .unwrap()
        .chars()
        .map(|c| c.to_digit(10).unwrap() as u64)
        .collect();
    let mut ans = n[n.len() - 1];
    let mul = n[n.len() - 1];
    let mut pow = 0;
    for i in 0..std::cmp::min(5, m.len()) {
        pow = pow * 10 + m[i];
    }
    pow = (pow - 1) % 4;
    for _ in 1..pow + 1 {
        ans = ans * mul % 10;
    }
    println!("{}", ans);
}