#[cfg(test)]
mod example {
    use day28::word_search;

    #[test]
    fn example() {
        assert_eq!(
            word_search(
                &[
                    vec!['o', 'a', 'a', 'n'],
                    vec!['e', 't', 'a', 'e'],
                    vec!['i', 'h', 'k', 'r'],
                    vec!['i', 'f', 'l', 'v']
                ],
                &["oath", "pea", "eat", "rain"]
            ),
            ["oath", "eat"]
        )
    }
}