use std::io::Read;

fn run() {
    let mut s = String::new();
    std::io::stdin().read_to_string(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let n: usize = it.next().unwrap().parse().unwrap();
    let mut deq = std::collections::VecDeque::new();
    for _ in 0..n {
        let op: usize = it.next().unwrap().parse().unwrap();
        let c: char = it.next().unwrap().chars().next().unwrap();
        if op == 0 {
            deq.push_back(c);
        } else {
            deq.push_front(c);
        }
    }
    let ans: String = deq.into_iter().collect();
    println!("{}", ans);
}

fn main() {
    run();
}