Problem:
Score : 200 points

Problem Statement

Let w be a string consisting of lowercase letters.
We will call w beautiful if the following condition is satisfied:

Each lowercase letter of the English alphabet occurs even number of times in w.

You are given the string w. Determine if w is beautiful.

Constraints

1 \leq |w| \leq 100

w consists of lowercase letters (a-z).

Input

The input is given from Standard Input in the following format:

w

Output

Print Yes if w is beautiful. Print No otherwise.

Sample Input 1

abaccaba

Sample Output 1

Yes

a occurs four times, b occurs twice, c occurs twice and the other letters occur zero times.

Sample Input 2

hthth

Sample Output 2

No

Solution in Rust (1.15.1) (judge verdict: Accepted)

fn main() {
    let mut c = [0; 26];
    let w = atcoder::read_single_string();

    for wc in w.chars() {
        let i = (wc as u8) - ('a' as u8);
        c[i as usize] += 1;
    }

    if c.iter().all(|i| i % 2 == 0) {
        println!("Yes");
    } else {
        println!("No");
    }
}

#[allow(dead_code)]
mod atcoder {
    pub fn read_single_num<T: ::std::str::FromStr>() -> T
        where <T as ::std::str::FromStr>::Err: ::std::fmt::Debug {
            let mut buffer = String::new();
            ::std::io::stdin().read_line(&mut buffer).unwrap();
            buffer.trim().parse().unwrap()
    }

    pub fn read_multiple_num<T: ::std::str::FromStr>() -> Vec<T>
        where <T as ::std::str::FromStr>::Err: ::std::fmt::Debug {
            let mut buffer = String::new();
            ::std::io::stdin().read_line(&mut buffer).unwrap();
            buffer.split_whitespace().map(|i| i.parse().unwrap() ).collect()
    }

    pub fn read_single_string() -> String {
            let mut buffer = String::new();
            ::std::io::stdin().read_line(&mut buffer).unwrap();
            buffer.trim().to_string()
    }

    pub fn read_multiple_string() -> Vec<String> {
            let mut buffer = String::new();
            ::std::io::stdin().read_line(&mut buffer).unwrap();
            buffer.split_whitespace().map(|s| s.to_string() ).collect()
    }
}