use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let n: Vec<usize> = s.split_whitespace().flat_map(str::parse).collect();
	let s = s.lines().last().unwrap();
	println!(
		"{}{}",
		&s[n[1] - 1..],
		if (n[0] - n[1]) % 2 == 0 {
			s[..n[1] - 1].chars().rev().collect::<_>()
		} else {
			s[..n[1] - 1].to_owned()
		}
	);
}