#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let mut c = 0;
    for pair in ['a', 'b', 'c']
        .into_iter()
        .map(|letter| {
            c += 1;
            (letter, c)
        })
        .rev()
    {
        println!("{pair:?}");
    }
}