#[macro_export]
macro_rules! setup {
    { mut $input:ident: SplitWhitespace $(,)? } => {
        use std::io::Read;
        let mut buf = String::new();
        std::io::stdin().read_to_string(&mut buf).unwrap();
        let mut $input = buf.split_whitespace();
    };
}

#[macro_export]
macro_rules! parse_next {
    ($str_iter:expr) => {
        $str_iter.next().unwrap().parse().unwrap()
    };
}

fn main() {
    setup! { mut input: SplitWhitespace };

    let a: String = parse_next!(input);
    let s: String = parse_next!(input);

    let map = a.chars().collect::<Vec<_>>();

    let ans = s.chars().fold(String::new(), |acc, c| match c {
        'a'..='z' => acc + &c.to_string(),
        _ => {
            let digit = String::from(c).parse::<usize>().unwrap();
            acc + &map[digit].to_string()
        }
    });

    println!("{}", ans);
}