Nerdsniped into doing piglatin

piglatin.rs

use std::io;

fn main() {
    let mut input = String::new();
    io::stdin()
        .read_line(&mut input)
        .expect("Failed to read line");
    println!("{}", piglatinize(input.trim()));
}

fn piglatinize(s: &str) -> String {
    if s.is_empty() {
        return String::new();
    }

    match first_vowel_location(s) {
        None => s.to_string() + "-hay",
        Some(index) => s[index..].to_string() + &s[..index] + "-ay",
    }
}

fn first_vowel_location(s: &str) -> Option<usize> {
    let vowels: &[_] = &['a', 'i', 'u', 'e', 'o'];

    s.find(vowels)
}