#![allow(unused_imports)]
use std::borrow::*;
use std::cmp::*;
use std::collections::*;
use std::iter::*;
use std::mem::*;
use std::*;
fn main() {
    use std::io::*;
    macro_rules! print{($($a:tt)*)=>{($($a)*)}}
    let mut v = vec!["".into()];
    let mut z:Vec<String> = vec![];
    let mut s = vec!["".into()];
    let mut g = |a:String| {
        v.push(a);
        if v.len() == 5 {
            s = v.clone();
            s.sort();
            for i in &v {
                for j in s.windows(2) {
                    if &j[1] == i {
                        z.push(j[0].clone());
                    }
                }
            }
            write!(stdout(),"{:?}",z);
        }
        ""
    };

    let arg0 = [
        "Beggars can't be choosers",
        "Do unto others as you would have them do to you",
        "Foop",
        "Egads",

    ];

    print!("[");
    for i in 0..arg0.len() {
        if i > 0 {
            print!(",");
        }
        print!("{:?}", g(arg0[i].to_string()));
    }
    print!("]");
}