use proconio::input;
use std::collections::{ HashMap, BTreeSet };

fn main() {
    /*
    input! {
        n: usize,
        q: usize,
        mut a: [u128; n],
    }

    let mut not_include: BTreeSet<u128> = (0..=n).map(|i| i as u128).collect();
    let mut counter: HashMap<u128, u128> = (0..=n).map(|i| (i as u128, 0)).collect();
    let n = n as u128;

    for e in &a {
        if e <= &n {
            *counter.get_mut(e).unwrap() += 1;
            not_include.remove(e);
        }
    }

    for _ in 0..q {
        input! {
            i: usize,
            x: u128,
        }
        let old = a[i];
        *counter.get_mut(&old).unwrap() -= 1;
        if *counter.get_mut(&old).unwrap() == 0 {
            not_include.insert(old);
        }
        a[i] = x;
        *counter.get_mut(&x).unwrap() += 1;
        not_include.remove(&x);
    }
    */
    input! {
        x: u64,
    }
    if x < 1200 {
        println!("green");
    } else {
        println!("difficult");
    }
}