fn superReducedString(s: &str) -> String {
    let mut last_idx = s.len() as i32;
    let mut result: Vec<&str> = s.split("").collect();
    let mut flag = true;

    while flag {
        flag = false;
        for n in 0..last_idx {
            if n <= last_idx {
                let first = n as usize;
                if result[first] == result[(n+1) as usize] {
                    result.remove(first);
                    result.remove(first);
                    last_idx -=2;
                    flag = true;
                } 
            }   
        }
    }
    if !(result.join("").is_empty()) {
        return result.join("")
    }
    "Empty String".to_string()
}