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

fn split_once<'a>(s: &'a str, sep: &str) -> (&'a str, &'a str) {
    let i = s.find(sep).unwrap();
    let left = &s[..i];
    let right = &s[i+sep.len()..];
    return (left, right);
}

fn main() {
    let path = args().nth(1).unwrap();
    let file = File::open(path).unwrap();

    let mut count = 0;

    for line in BufReader::new(file).lines() {
        let l = line.unwrap();
        let (_, right) = split_once(&l, " | ");
        count += right
            .split(" ")
            .filter(|s| match s.len() {2|3|4|7 => true, _ => false})
            .count()
    }

    print!("{}\n", count);
}