Add return

day_04/src/main.rs

@@ -24,6 +24,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let crossword = Crossword::new(File::open(input_file_string)?)?;
 
     println!("{}", crossword);
+
     println!("n:  {}", crossword.n(3, 3).take(4));
     println!("ne: {}", crossword.ne(3, 3).take(4));
     println!("e:  {}", crossword.e(3, 3).take(4));