use serenity::{
    model::channel::Message,
    prelude::{Context},
};

use serenity::{model::channel::Message, prelude::Context};

    for c in msg.content.chars().skip("!mock".len()) {
        if !c.is_ascii_alphabetic() {

    for c in msg.content.chars().skip("!mock".chars().count()) {
        if !c.is_alphabetic() {

            new.push(c.to_ascii_lowercase());

            new.push_str(&c.to_lowercase().to_string());

            new.push(c.to_ascii_uppercase());

            new.push_str(&c.to_uppercase().to_string());