fn process(input: &str) -> (String, u32) {
    let num_changes = 0;
    let mut peekables = input.chars().peekable();
    while let Some(current_char) = peekables.next() {
        println!("Checking {current_char} and {}", peekables.next().unwrap());
    }

    (String::new(), num_changes)
}

fn process_recursively(input: &str) -> String {
    let mut working_str = input;
    println!("RECURSIVE START: {}", input.len());
    let mut need_again = true;
    while need_again {
        let (working, last_count) = process(working_str);
        if last_count > 0 { need_again = true; }
        let w2 = working.clone();
        working_str = w2.as_str();
    }
    "dabCBAcaDA".to_string()
}

fn main() {
    assert_eq!(process_recursively("dabAcCaCBAcCcaDA"), "dabCBAcaDA");
}