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#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
let mut s = String::new();
std::io::stdin().read_line(&mut s).ok();
s.trim().parse().ok().unwrap()
}
#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
read::<String>()
.split_whitespace()
.map(|e| e.parse().ok().unwrap())
.collect()
}
#[allow(dead_code)]
fn read_mat<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
(0..n).map(|_| read_vec()).collect()
}
fn solve() {
let inp = read::<String>();
let s = inp.as_bytes();
let mut marks = vec![true; s.len()];
let mut rmost_l = vec![s.iter().position(|&x| x.is_ascii_lowercase()).unwrap_or(0)];
let mut rmost_h = vec![s.iter().position(|&x| x.is_ascii_uppercase()).unwrap_or(0)];
for (i, &c) in s.iter().enumerate() {
match c as char {
'b' => {
marks[i] = false;
marks[rmost_l.pop().unwrap_or(i)] = false;
}
'B' => {
marks[i] = false;
marks[rmost_h.pop().unwrap_or(i)] = false;
}
_ => {}
};
if c.is_ascii_uppercase() && c != 'B' as u8 {
rmost_h.push(i);
} else if c.is_ascii_lowercase() && c != 'b' as u8 {
rmost_l.push(i);
}
}
let ans = s
.iter()
.zip(marks.iter())
.filter_map(|(&x, include)| include.then_some(x as char))
.collect::<String>();
println!("{}", ans)
}
fn main() {
let mut tt = read::<u64>();
while tt > 0 {
solve();
tt -= 1;
}
}
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