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    use rand::prelude::*;
    use regex::Regex;
    use std::str::FromStr;

    #[cfg(test)]
    mod tests {
        use super::*;
        #[test]
        fn owo() {
            let text = String::from("malfunction me mom.. t-till i break~~");
            let owoified = text.owoify();
            println!("\t\t{}", owoified);
        }
        #[test]
        fn all_match_owo() {
            let text = String::from("r l R L na Na NA ove !!");
            println!("\t\t{}", text.owoify());
        }
    }

    pub trait OwOifiable {
        /// The owoification method
        fn owoify(&self) -> Self;
    }

    impl OwOifiable for String {
        /// Owoifies a String
        ///
        /// # Examples
        ///
        /// ```
        /// use use owoify::OwOifiable;
        /// let owoified = String::from("Example text").owoify();
        /// ```
        fn owoify(&self) -> Self {
            let mut rng = rand::thread_rng();
            let faces = ["(・`ω´・)", "OwO", "owo", "oωo", "òωó", "°ω°", "UwU", ">w<", "^w^"];
            let face = &format!(" {} ", faces[rng.gen_range(0, faces.len())]).to_owned();
            let pats: Vec<(&str, &str)> = vec![
                ("(?:r|l)", "w"),
                ("(?:R|L)", "W"),
                ("n([aeiou])", "ny$1"),
                ("N([aeiou])", "Ny$1"),
                ("N([AEIOU])", "Ny$1"),
                ("ove", "uv"),
                ("!+", face),
            ];

            let mut owoified = String::from_str(&self).unwrap();

            for &(f, t) in &pats {
                let re = Regex::new(f).unwrap();
                owoified = re.replace_all(&owoified, t).to_string();
            }

            owoified
        }
    }

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