fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n = n.trim().chars().collect::<Vec<_>>();
    let mut k = String::new();
    std::io::stdin().read_line(&mut k).ok();
    let k = k.trim().chars().collect::<Vec<_>>();

    let mut nval = 0usize;
    for i in 0..n.len() {
        nval += n[i] as usize - '0' as usize;
        nval %= 6;
        if n.len() == i + 1 {
            break;
        }
        nval *= 10;
    }
    match nval {
        0 => { println!("4"); },
        1 => { println!("2"); },
        2 => { println!("{}", if (k[k.len()-1] as usize - '0' as usize) % 2 == 0 { 7 } else { 8 }); },
        3 => { println!("5"); },
        4 => { println!("7"); },
        5 => { println!("{}", if (k[k.len()-1] as usize - '0' as usize) % 2 == 0 { 2 } else { 1 }); },
        _ => { unreachable!(); }
    }
}