use std::io::{self, BufRead};

const DIFF: i64 = 'a' as i64 - 'A' as i64;

fn main() {
    io::stdin().lock().lines().for_each(|l| {
        let password = l
            .unwrap()
            .chars()
            .map(|c| match c {
                'a'..='z' => c as i64 - DIFF,
                _ => c as i64 + DIFF,
            })
            .map(|c| char::from_u32(c as u32).unwrap())
            .collect::<String>();

        println!("{}", password);
    });
}