use std::io::Write;

fn main() {
    let alpha = {
        let mut line = String::new();
        std::io::stdin().read_line(&mut line).unwrap();
        line.trim().parse::<String>().unwrap()
    };
    let mut prev = alpha.repeat(2);
    loop {
        println!("? {}", prev.chars().rev().collect::<String>());
        std::io::stdout().flush().unwrap();

        let (symbol, t) = {
            let mut line = String::new();
            std::io::stdin().read_line(&mut line).unwrap();
            let mut iter = line.split_whitespace();
            (
                iter.next().unwrap().parse::<char>().unwrap(),
                iter.next().unwrap().parse::<String>().unwrap(),
            )
        };

        if symbol == '!' {
            break;
        }

        prev = t.to_string();
    }
}