use std::collections::{HashMap, HashSet};

fn main() {
    proconio::input! {
        n: String,
        m: String,
    }
    let n = n.chars().last().map(|c| c.to_digit(10).unwrap()).unwrap();
    let m = m
        .chars()
        .rev()
        .take(2)
        .collect::<Vec<_>>()
        .into_iter()
        .rev()
        .collect::<String>()
        .parse::<u32>()
        .unwrap();
    println!("{}", pow_mod10(n, m));
}

fn pow_mod10(a:u32, b:u32) -> u32 {
    let mut a = a;
    let mut b = b;
    let mut res = 1;
    while b > 0 {
        if b % 2 == 1 {
            res = (res * a) % 10;
        }
        a = (a * a) % 10;
        b /= 2;
    }
    res
}