#![allow(non_snake_case)]
#![allow(unused_imports)]
#![allow(unused_macros)]
#![allow(clippy::needless_range_loop)]
#![allow(clippy::comparison_chain)]
#![allow(clippy::nonminimal_bool)]
#![allow(clippy::neg_multiply)]
#![allow(dead_code)]
#![allow(clippy::collapsible_else_if)]
use proconio::{
    fastout, input, input_interactive,
    marker::{Chars, Usize1},
};
use std::cmp::Reverse;
use std::collections::BinaryHeap;
use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet, VecDeque};
use std::mem::swap;

//const MOD: usize = 1e9 as usize + 7;
const MOD: usize = 998244353;
// const MOD: usize = 2147483647;

#[macro_export]
macro_rules! max {
    ($x: expr) => ($x);
    ($x: expr, $( $y: expr ),+) => {
        std::cmp::max($x, max!($( $y ),+))
    }
}
#[macro_export]
macro_rules! min {
    ($x: expr) => ($x);
    ($x: expr, $( $y: expr ),+) => {
        std::cmp::min($x, min!($( $y ),+))
    }
}
fn main() {
    input_interactive! {
        s0:char,
    }
    let mut first_output = String::new();
    first_output.push(s0);
    first_output.push(s0);
    println!("? {}", first_output);
    for _ in 0..100 {
        input_interactive! {
            res1:char,
            res2:Chars,
        }
        if res1 == '!' {
            return;
        }
        let mut output = String::new();
        output.push(res2[1]);
        output.push(s0);
        println!("? {}", output);
    }
}