use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let mut l = s.lines();
	let n = l.next().unwrap().parse::<usize>().unwrap();
	let mut v: Vec<_> = l
		.map(|l| l.split(' ').skip(1).flat_map(str::parse::<u64>))
		.collect();
	let mut a = vec![];
	let mut e = 0;
	while e < n {
		e = 0;
		for i in &mut v {
			if let Some(x) = i.next() {
				a.push(x);
			} else {
				e += 1;
			}
		}
	}

	println!(
		"{}",
		a.iter()
			.map(|x| x.to_string())
			.collect::<Vec<_>>()
			.join(" ")
	);
}