use std::io;

fn main() {
	let mut n: String = String::new();
	let mut s: String = String::new();
	io::stdin().read_line(&mut n).ok();
	io::stdin().read_line(&mut s).ok();
	
	let mut s = s.lines().collect::<String>();
	s.pop();
	s.remove(0);

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