fn start_main() -> i64 {
    print("Name: ");
    let name: string = read_line();
    let next: i64 = 41 + 1;
    let greeting: string = "Hello, " + name + "! Next: " + format_i64(next);
    print(greeting + "\n");
    let text: string = "مرحبا";
    print(format_i64(length(text)) + "\n");
    print(slice(text, 1, 4) + "\n");
    return 0;
}