use std::fs;

fn main() {
    let content =
        fs::read_to_string("/usr/share/dict/words").unwrap_or("cannot read file".to_string());
    let longest_word =
        content.split("\n").fold(
            "",
            |prev, cur| if cur.len() > prev.len() { cur } else { prev },
        );
    println!("{longest_word}");
}