fn main() {
    let mut xx = String::new();
    std::io::stdin().read_line(&mut xx).ok();
    let xx: Vec<usize> = xx.split_whitespace().flat_map(str::parse).collect();

    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let mut s: Vec<char> = s.trim().chars().collect();

    for i in 0..=(xx[0] - xx[1]) {
        s[i..i + xx[1]].reverse();
    }

    let answer: String = s.iter().collect();

    println!("{answer}");
}