use std::{collections::BinaryHeap, cmp::Reverse};


fn main() {
    let mut nk = String::new();
    std::io::stdin().read_line(&mut nk).ok();
    let nk: Vec<usize> = nk.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nk[0];
    let k = nk[1];
    let items = (0..n).map(|_| {
            let mut temp = String::new();
            std::io::stdin().read_line(&mut temp).ok();
            let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
            (temp[0], temp[1], temp[2]-1)
        })
        .collect::<Vec<_>>();

    let mut mapping = vec![vec![]; 100000];
    for i in 0..n {
        let (s, p, u) = items[i];
        mapping[u].push(i);
    }
    let mut pque = BinaryHeap::new();
    for i in 0..100000 {
        mapping[i].sort_by_key(|&i| (Reverse(items[i].0), items[i].1));
        for (idx, &j) in mapping[i].iter().enumerate() {
            let (s, p, _) = items[j];
            pque.push((s, Reverse(idx), Reverse(p), j));
        }
    }
    for _ in 0..k {
        println!("{}", pque.pop().unwrap().3);
    }
}