fn main() {
    let bytes = vec![
        vec![72, 69, 76, 76, 79],
        vec![69, 65, 82, 84, 72, 76, 73, 78, 71, 83]
    ];
    for i in 0..bytes.len() {
        let string = std::str::from_utf8(&bytes[i]).expect("not UTF-8 data");
        match string {
            "HELLO" => println!("Greetings"),
            _ => println!("Hello {}", string),
        }
    }
}