use std::env;
use std::fs::File;
use std::io::BufReader;
use std::io::BufRead;

fn score(line: String) -> i64 {
    match line.trim() {
        "A X" => 1 + 3,
        "A Y" => 2 + 6,
        "A Z" => 3 + 0,
        "B X" => 1 + 0,
        "B Y" => 2 + 3,
        "B Z" => 3 + 6,
        "C X" => 1 + 6,
        "C Y" => 2 + 0,
        "C Z" => 3 + 3,
        _other => 0,
    }
}

fn main() {
    let args: Vec<String> = env::args().collect();
    let input = &args[1];
    let reader = BufReader::new(File::open(input).expect("where file?"));

    let mut sum = 0;
    for line in reader.lines() {
        sum += score(line.unwrap());
    }

    println!("Sum: {}", sum);
}