use std::env;
use std::fs::File;
use std::io::Read;

fn main() {
    for arg in env::args() {
        match File::open(&arg) {
            Ok(mut f) => {
                let mut s = String::new();
                f.read_to_string(&mut s).ok();
                let mut sp = s.split("\n").collect::<Vec<&str>>();
                sp.sort();
                println!("{}", sp.join("\n"));
            },
            Err(e) => {
                panic!("Can't read file: {}", e);
            }
        }
    }
}