use proconio::input;

fn main() {
    input! {
        (n, m): (usize, usize),
        sp: [(String, u64); n],
        tt: [String; m],
    }

    let str_to_p = |t: &str| sp.iter().find(|(s, _)| s == t).unwrap().1;

    let total = tt.iter().map(|t| str_to_p(t)).sum::<u64>();
    println!("{total}");
}